Merge #211923: staging-next 2023-01-21

2023-01-31 09:42:28 +01:00 · 2023-01-31 09:42:28 +01:00 · e4957a85c9
parent 7f299adbdd 66bb8338fc
commit e4957a85c9
247 changed files with 5427 additions and 1309 deletions
--- a/doc/stdenv/stdenv.chapter.md
+++ b/doc/stdenv/stdenv.chapter.md
@ -253,7 +253,7 @@ The propagated equivalent of `depsTargetTarget`. This is prefixed for the same r

 #### `NIX_DEBUG` {#var-stdenv-NIX_DEBUG}

-A natural number indicating how much information to log. If set to 1 or higher, `stdenv` will print moderate debugging information during the build. In particular, the `gcc` and `ld` wrapper scripts will print out the complete command line passed to the wrapped tools. If set to 6 or higher, the `stdenv` setup script will be run with `set -x` tracing. If set to 7 or higher, the `gcc` and `ld` wrapper scripts will also be run with `set -x` tracing.
+A number between 0 and 7 indicating how much information to log. If set to 1 or higher, `stdenv` will print moderate debugging information during the build. In particular, the `gcc` and `ld` wrapper scripts will print out the complete command line passed to the wrapped tools. If set to 6 or higher, the `stdenv` setup script will be run with `set -x` tracing. If set to 7 or higher, the `gcc` and `ld` wrapper scripts will also be run with `set -x` tracing.

 ### Attributes affecting build properties {#attributes-affecting-build-properties}

--- a/lib/systems/inspect.nix
+++ b/lib/systems/inspect.nix
@ -82,8 +82,13 @@ rec {
    isMusl         = with abis; map (a: { abi = a; }) [ musl musleabi musleabihf muslabin32 muslabi64 ];
    isUClibc       = with abis; map (a: { abi = a; }) [ uclibc uclibceabi uclibceabihf ];

-    isEfi          = map (family: { cpu.family = family; })
-                       [ "x86" "arm" "riscv" ];
+    isEfi = [
+      { cpu = { family = "arm"; version = "6"; }; }
+      { cpu = { family = "arm"; version = "7"; }; }
+      { cpu = { family = "arm"; version = "8"; }; }
+      { cpu = { family = "riscv"; }; }
+      { cpu = { family = "x86"; }; }
+    ];
  };

  matchAnyAttrs = patterns:
--- a/nixos/doc/manual/from_md/release-notes/rl-2305.section.xml
+++ b/nixos/doc/manual/from_md/release-notes/rl-2305.section.xml
@ -351,6 +351,12 @@
          relying on this should provide their own implementation.
        </para>
      </listitem>
+      <listitem>
+        <para>
+          Calling <literal>makeSetupHook</literal> without passing a
+          <literal>name</literal> argument is deprecated.
+        </para>
+      </listitem>
      <listitem>
        <para>
          Qt 5.12 and 5.14 have been removed, as the corresponding
@ -413,6 +419,17 @@
          https://dotnet.microsoft.com/en-us/platform/support/policy/dotnet-core
        </para>
      </listitem>
+      <listitem>
+        <para>
+          The iputils package, which is installed by default, no longer
+          provides the <literal>ninfod</literal>,
+          <literal>rarpd</literal> and <literal>rdisc</literal> tools.
+          See
+          <link xlink:href="https://github.com/iputils/iputils/releases/tag/20221126">upstream’s
+          release notes</link> for more details and available
+          replacements.
+        </para>
+      </listitem>
    </itemizedlist>
  </section>
  <section xml:id="sec-release-23.05-notable-changes">
--- a/nixos/doc/manual/release-notes/rl-2305.section.md
+++ b/nixos/doc/manual/release-notes/rl-2305.section.md
@ -87,6 +87,8 @@ In addition to numerous new and upgraded packages, this release has the followin

 - The EC2 image module previously detected and activated swap-formatted instance store devices and partitions in stage-1 (initramfs). This behaviour has been removed. Users relying on this should provide their own implementation.

+- Calling `makeSetupHook` without passing a `name` argument is deprecated.
+
 - Qt 5.12 and 5.14 have been removed, as the corresponding branches have been EOL upstream for a long time. This affected under 10 packages in nixpkgs, largely unmaintained upstream as well, however, out-of-tree package expressions may need to be updated manually.

 - The [services.wordpress.sites.&lt;name&gt;.plugins](#opt-services.wordpress.sites._name_.plugins) and [services.wordpress.sites.&lt;name&gt;.themes](#opt-services.wordpress.sites._name_.themes) options have been converted from sets to attribute sets to allow for consumers to specify explicit install paths via attribute name.
@ -101,6 +103,11 @@ In addition to numerous new and upgraded packages, this release has the followin

 - .NET 5.0 was removed due to being end-of-life, use a newer, supported .NET version - https://dotnet.microsoft.com/en-us/platform/support/policy/dotnet-core

+- The iputils package, which is installed by default, no longer provides the
+  `ninfod`, `rarpd` and `rdisc` tools. See
+  [upstream's release notes](https://github.com/iputils/iputils/releases/tag/20221126)
+  for more details and available replacements.
+
 ## Other Notable Changes {#sec-release-23.05-notable-changes}

 <!-- To avoid merge conflicts, consider adding your item at an arbitrary place in the list instead. -->
--- a/nixos/modules/services/desktops/pipewire/daemon/client-rt.conf.json
+++ b/nixos/modules/services/desktops/pipewire/daemon/client-rt.conf.json
@ -35,5 +35,20 @@
    }
  ],
  "filter.properties": {},
-  "stream.properties": {}
+  "stream.properties": {},
+  "alsa.properties": {},
+  "alsa.rules": [
+    {
+      "matches": [
+        {
+          "application.process.binary": "resolve"
+        }
+      ],
+      "actions": {
+        "update-props": {
+          "alsa.buffer-bytes": 131072
+        }
+      }
+    }
+  ]
 }
--- a/nixos/modules/services/desktops/pipewire/daemon/jack.conf.json
+++ b/nixos/modules/services/desktops/pipewire/daemon/jack.conf.json
@ -58,6 +58,18 @@
          "node.passive": true
        }
      }
+    },
+    {
+      "matches": [
+        {
+          "client.name": "Mixxx"
+        }
+      ],
+      "actions": {
+        "update-props": {
+          "jack.merge-monitor": false
+        }
+      }
    }
  ]
 }
--- a/nixos/modules/services/hardware/bluetooth.nix
+++ b/nixos/modules/services/hardware/bluetooth.nix
@ -71,6 +71,29 @@ in
        };
        description = lib.mdDoc "Set configuration for system-wide bluetooth (/etc/bluetooth/main.conf).";
      };
+
+      input = mkOption {
+        type = cfgFmt.type;
+        default = { };
+        example = {
+          General = {
+            IdleTimeout = 30;
+            ClassicBondedOnly = true;
+          };
+        };
+        description = lib.mdDoc "Set configuration for the input service (/etc/bluetooth/input.conf).";
+      };
+
+      network = mkOption {
+        type = cfgFmt.type;
+        default = { };
+        example = {
+          General = {
+            DisableSecurity = true;
+          };
+        };
+        description = lib.mdDoc "Set configuration for the network service (/etc/bluetooth/network.conf).";
+      };
    };
  };

@ -80,6 +103,10 @@ in
    environment.systemPackages = [ package ]
      ++ optional cfg.hsphfpd.enable pkgs.hsphfpd;

+    environment.etc."bluetooth/input.conf".source =
+      cfgFmt.generate "input.conf" cfg.input;
+    environment.etc."bluetooth/network.conf".source =
+      cfgFmt.generate "network.conf" cfg.network;
    environment.etc."bluetooth/main.conf".source =
      cfgFmt.generate "main.conf" (recursiveUpdate defaults cfg.settings);
    services.udev.packages = [ package ];
--- a/pkgs/applications/audio/fluidsynth/default.nix
+++ b/pkgs/applications/audio/fluidsynth/default.nix
@ -5,13 +5,13 @@

 stdenv.mkDerivation rec {
  pname = "fluidsynth";
-  version = "2.3.0";
+  version = "2.3.1";

  src = fetchFromGitHub {
    owner = "FluidSynth";
    repo = "fluidsynth";
    rev = "v${version}";
-    sha256 = "sha256-7SuM7a8IIecAJ83QvJfUba/wArAEXywqL2HwVbeG8H4=";
+    sha256 = "05lr9f0q4x1kvgfa3xrfmagpwvijv9m1s316aa9figqlkcc5vv4k";
  };

  nativeBuildInputs = [ buildPackages.stdenv.cc pkg-config cmake ];
--- a/pkgs/applications/audio/rhvoice/honor_nix_environment.patch
+++ b/pkgs/applications/audio/rhvoice/honor_nix_environment.patch
@ -1,5 +1,3 @@
-diff --git a/SConstruct b/SConstruct
-index 3ad4d9a..fb02365 100644
 --- a/SConstruct
 +++ b/SConstruct
@@ -94,11 +94,8 @@ def CheckWiX(context):
@ -16,13 +14,15 @@ index 3ad4d9a..fb02365 100644
 
 def validate_spd_version(key,val,env):
     m=re.match(r"^\d+\.\d+",val)
-@@ -208,9 +205,9 @@ def create_base_env(user_vars):
+@@ -207,10 +204,10 @@ def create_base_env(user_vars):
+     env_args["LIBS"]=[]
     env_args["package_name"]="RHVoice"
     env_args["CPPDEFINES"]=[("RHVOICE","1")]
-     env=Environment(**env_args)
+-    env=Environment(**env_args)
 -    if env["dev"]:
 -        env["prefix"]=os.path.abspath("local")
 -        env["RPATH"]=env.Dir("$libdir").abspath
+    env=Environment(ENV = os.environ, **env_args)
 +    env.PrependENVPath("PATH", os.environ["PATH"])
 +    env["ENV"]["PKG_CONFIG_PATH"]=os.environ["PKG_CONFIG_PATH"]
 +    env["RPATH"]=env.Dir("$libdir").abspath
--- a/pkgs/applications/graphics/fluxus/default.nix
+++ b/pkgs/applications/graphics/fluxus/default.nix
@ -22,26 +22,6 @@
 , zlib
 }:
 let
-  libs = [
-    alsa-lib
-    bzip2
-    fftw
-    freeglut
-    freetype
-    glew
-    libjack2
-    libGL
-    libGLU
-    libjpeg
-    liblo
-    libpng
-    libsndfile
-    libtiff
-    ode
-    openal
-    openssl
-    zlib
-  ];
  racket = racket_7_9;
 in
 stdenv.mkDerivation rec {
@ -77,7 +57,6 @@ stdenv.mkDerivation rec {
    "RacketPrefix=${racket}"
    "RacketInclude=${racket}/include/racket"
    "RacketLib=${racket}/lib/racket"
-    "LIBPATH=${lib.makeLibraryPath libs}"
    "DESTDIR=build"
  ];
  configurePhase = ''
--- a/pkgs/applications/graphics/fluxus/fix-build.patch
+++ b/pkgs/applications/graphics/fluxus/fix-build.patch
@ -1,5 +1,10 @@
-diff --git a/SConstruct b/SConstruct
-index 32cb644..650333a 100644
+scons does not use os environment by default:
+  https://scons.org/doc/2.1.0/HTML/scons-user/x1750.html
+
+nixpkgs' cc-wrapper on the other hand relies on various NIX_* variables
+to be passed through like NIX_CFLAGS_COMPILE_BEFORE.
+
+While at it ported to python3-style print().
 --- a/SConstruct
 +++ b/SConstruct
@@ -6,7 +6,7 @@
@ -11,16 +16,15 @@ index 32cb644..650333a 100644
 
 MajorVersion = "0"
 MinorVersion = "19"
-@@ -225,13 +225,18 @@ if env['PLATFORM'] == 'posix':
-                     ["asound", "alsa/asoundlib.h"],
-                     ["openal", "AL/al.h"]]
+@@ -100,6 +100,7 @@ IncludePaths = [
+ paranoid = ' -W -Wcast-qual -Wwrite-strings -Wcast-align -Wpointer-arith -Wconversion -Wredundant-decls -Wunreachable-code -Winline -Wlarger-than-256'
 
-+env.Append(ENV={'PATH': ' ' + os.environ['PATH'], })
-+env.Append(LIBPATH=ARGUMENTS.get('LIBPATH', '').split(':'))
-+env.Append(CCFLAGS=' ' + os.environ.get('NIX_CFLAGS_COMPILE',''))
-+env.Append(CCFLAGS=' -DNULL=0')
-+
- ################################################################################
+ env = Environment(CCFLAGS = '-ggdb -pipe -Wall -O3 -ffast-math -Wno-unused -fPIC -pthread',
+                  ENV = os.environ,
+                   VERSION_NUM = FluxusVersion)
+ env.MergeFlags(ARGUMENTS.get('CCFLAGS', '').split())
+ env.MergeFlags(ARGUMENTS.get('LDFLAGS', '').split())
+@@ -229,9 +230,9 @@ if env['PLATFORM'] == 'posix':
 # Make sure we have these libraries availible
 
 if not GetOption('clean'):
@ -33,7 +37,7 @@ index 32cb644..650333a 100644
         # detect ode precision
         if not GetOption('clean'):
           try:
-@@ -240,27 +245,27 @@ if not GetOption('clean'):
+@@ -240,27 +241,27 @@ if not GetOption('clean'):
             if isinstance(ode_str[0], str):
               env.MergeFlags(ode_str[0])
           except:
@ -65,7 +69,7 @@ index 32cb644..650333a 100644
                         Exit(1)
 
         if not conf.CheckFunc("dInitODE2"):
-@@ -334,7 +339,7 @@ if not GetOption('clean'):
+@@ -334,7 +335,7 @@ if not GetOption('clean'):
 			])
 
 	if raco_status != 0:
@ -74,7 +78,7 @@ index 32cb644..650333a 100644
 		Exit(1)
 
 
-@@ -377,8 +382,8 @@ if not GetOption('clean') and static_modules:
+@@ -377,8 +378,8 @@ if not GetOption('clean') and static_modules:
 
 		app_env['LIBS'].remove("pthread")
 		app_env['LIBS'].remove("dl")
@ -85,7 +89,7 @@ index 32cb644..650333a 100644
 
 		# now go through the rest of the libs, removing them from
 		# the environment at the same time
-@@ -425,7 +430,7 @@ SConscript(dirs = build_dirs,
+@@ -425,7 +426,7 @@ SConscript(dirs = build_dirs,
 if not GetOption('clean'):
     helpmap_status = subprocess.call(["racket", "makehelpmap.scm"], cwd="docs/helpmap")
     if helpmap_status != 0:
--- a/pkgs/applications/networking/browsers/firefox/common.nix
+++ b/pkgs/applications/networking/browsers/firefox/common.nix
@ -525,7 +525,7 @@ buildStdenv.mkDerivation ({
            fi

            # Extract the debug info.
-            header "separating debug info from $i (build ID $id)"
+            echo "separating debug info from $i (build ID $id)"
            mkdir -p "$dst/''${id:0:2}"
            $OBJCOPY --only-keep-debug "$i" "$dst/''${id:0:2}/''${id:2}.debug"

--- a/pkgs/applications/terminal-emulators/xterm/default.nix
+++ b/pkgs/applications/terminal-emulators/xterm/default.nix
@ -4,14 +4,14 @@

 stdenv.mkDerivation rec {
  pname = "xterm";
-  version = "377";
+  version = "378";

  src = fetchurl {
    urls = [
      "ftp://ftp.invisible-island.net/xterm/${pname}-${version}.tgz"
      "https://invisible-mirror.net/archives/xterm/${pname}-${version}.tgz"
    ];
-    hash = "sha256-2xCP56Rdjtl+YEchtYRDtHNknmHiY2Mb+HWfhhipkLI=";
+    hash = "sha256-ZJ37/V7dDtnkfPjk2VO0sNPDC8KAFm38T/0Ulz/sPpI=";
  };

  strictDeps = true;
--- a/pkgs/applications/version-management/git/default.nix
+++ b/pkgs/applications/version-management/git/default.nix
@ -28,7 +28,7 @@ assert sendEmailSupport -> perlSupport;
 assert svnSupport -> perlSupport;

 let
-  version = "2.39.0";
+  version = "2.39.1";
  svn = subversionClient.override { perlBindings = perlSupport; };
  gitwebPerlLibs = with perlPackages; [ CGI HTMLParser CGIFast FCGI FCGIProcManager HTMLTagCloud ];
 in
@ -41,7 +41,7 @@ stdenv.mkDerivation (finalAttrs: {

  src = fetchurl {
    url = "https://www.kernel.org/pub/software/scm/git/git-${version}.tar.xz";
-    sha256 = "sha256-uhmbE/tamco97JF7C9c2vA61qd+Hc31DXt398Q1pJls=";
+    sha256 = "sha256-QKOKCEezDDcbNYc7OvzxI4hd1B6j7Lv1EO+pfzzlwWE=";
  };

  outputs = [ "out" ] ++ lib.optional withManual "doc";
--- a/pkgs/build-support/cc-wrapper/default.nix
+++ b/pkgs/build-support/cc-wrapper/default.nix
@ -321,6 +321,11 @@ stdenv.mkDerivation {
                      && !(stdenv.targetPlatform.useLLVM or false)
                      && gccForLibs != null) ''
      echo "--gcc-toolchain=${gccForLibs}" >> $out/nix-support/cc-cflags
+
+      # Pull in 'cc.out' target to get 'libstdc++fs.a'. It should be in
+      # 'cc.lib'. But it's a gcc package bug.
+      # TODO(trofi): remove once gcc is fixed to move libraries to .lib output.
+      echo "-L${gccForLibs}/${optionalString (targetPlatform != hostPlatform) "/${targetPlatform.config}"}/lib" >> $out/nix-support/cc-ldflags
    ''

    ##
@ -338,11 +343,18 @@ stdenv.mkDerivation {
    # compile, because it uses "#include_next <limits.h>" to find the
    # limits.h file in ../includes-fixed. To remedy the problem,
    # another -idirafter is necessary to add that directory again.
+    #
+    # We use --sysroot=/nix/store/does/not/exist to drop embedded default
+    # path to glibc headers gcc was built against. Without it -idirafter
+    # only appends to the list and outdated glibc headers end up being
+    # used. 'cc-cflags-before' is used to allow user's --sysroot= option
+    # to override our default.
    + optionalString (libc != null) (''
      touch "$out/nix-support/libc-cflags"
      touch "$out/nix-support/libc-ldflags"
      echo "-B${libc_lib}${libc.libdir or "/lib/"}" >> $out/nix-support/libc-crt1-cflags
    '' + optionalString (!(cc.langD or false)) ''
+      echo "--sysroot=/nix/store/does/not/exist" >> $out/nix-support/cc-cflags-before
      echo "-idirafter ${libc_dev}${libc.incdir or "/include"}" >> $out/nix-support/libc-cflags
    '' + optionalString (isGNU && (!(cc.langD or false))) ''
      for dir in "${cc}"/lib/gcc/*/*/include-fixed; do
--- a/pkgs/build-support/fetchbzr/builder.sh
+++ b/pkgs/build-support/fetchbzr/builder.sh
@ -1,10 +1,8 @@
 if [ -e .attrs.sh ]; then source .attrs.sh; fi
 source "$stdenv/setup"

-header "exporting \`$url' (revision $rev) into \`$out'"
+echo "exporting \`$url' (revision $rev) into \`$out'"

 # Perform a lightweight checkout so that we don't end up importing
 # all the repository's history.
 BZR_LOG=/dev/null bzr -Ossl.cert_reqs=none export -r "$rev" --format=dir "$out" "$url"
-
-stopNest
--- a/pkgs/build-support/fetchcvs/builder.sh
+++ b/pkgs/build-support/fetchcvs/builder.sh
@ -24,5 +24,3 @@ else
 fi
 (cd export && cvs -f -z0 -d "$cvsRoot" export $tag "$module")
 mv export/* $out
-
-stopNest
--- a/pkgs/build-support/fetchdarcs/builder.sh
+++ b/pkgs/build-support/fetchdarcs/builder.sh
@ -11,10 +11,8 @@ elif test -n "$context"; then
    tagflags="--context=$context"
 fi

-header "getting $url $partial ${tagtext} into $out"
+echo "getting $url $partial ${tagtext} into $out"

 darcs get --lazy $tagflags "$url" "$out"
 # remove metadata, because it can change
 rm -rf "$out/_darcs"
-
-stopNest
--- a/pkgs/build-support/fetchdocker/fetchdocker-builder.sh
+++ b/pkgs/build-support/fetchdocker/fetchdocker-builder.sh
@ -1,6 +1,6 @@
 if [ -e .attrs.sh ]; then source .attrs.sh; fi
 source "${stdenv}/setup"
-header "exporting ${repository}/${imageName} (tag: ${tag}) into ${out}"
+echo "exporting ${repository}/${imageName} (tag: ${tag}) into ${out}"
 mkdir -p "${out}"

 cat <<EOF > "${out}/compositeImage.sh"
@ -26,4 +26,3 @@ ${gnutar}/bin/tar \
  -c "${manifest}" "${repositories}" -T "${imageFileStorePaths}"
 EOF
 chmod +x "${out}/compositeImage.sh"
-stopNest
--- a/pkgs/build-support/fetchdocker/generic-fetcher.nix
+++ b/pkgs/build-support/fetchdocker/generic-fetcher.nix
@ -36,7 +36,7 @@ stdenv.mkDerivation {
  inherit name;
  builder = writeText "${fetcher}-builder.sh" ''
    source "$stdenv/setup"
-    header "${fetcher} exporting to $out"
+    echo "${fetcher} exporting to $out"

    declare -A creds

@ -49,7 +49,7 @@ stdenv.mkDerivation {
    fi

    if [ -f "$dockerCredentialsFile" ]; then
-      header "using credentials from $dockerCredentialsFile"
+      echo "using credentials from $dockerCredentialsFile"

      CREDSFILE=$(cat "$dockerCredentialsFile")
      creds[token]=$(${awk} -F'=' '/DOCKER_TOKEN/ {print $2}' <<< "$CREDSFILE" | head -n1)
@ -77,8 +77,6 @@ stdenv.mkDerivation {
      ${layerDigestFlag} \
      "${repository}/${imageName}" \
      "${tag}"
-
-    stopNest
  '';

  buildInputs = [ haskellPackages.hocker ];
--- a/pkgs/build-support/fetchfirefoxaddon/default.nix
+++ b/pkgs/build-support/fetchfirefoxaddon/default.nix
@ -29,7 +29,7 @@ stdenv.mkDerivation {
  builder = writeScript "xpibuilder" ''
    source $stdenv/setup

-    header "firefox addon $name into $out"
+    echo "firefox addon $name into $out"

    UUID="${extid}"
    mkdir -p "$out/$UUID"
--- a/pkgs/build-support/fetchfossil/builder.sh
+++ b/pkgs/build-support/fetchfossil/builder.sh
@ -1,6 +1,6 @@
 if [ -e .attrs.sh ]; then source .attrs.sh; fi
 source $stdenv/setup
-header "Cloning Fossil $url [$rev] into $out"
+echo "Cloning Fossil $url [$rev] into $out"

 # Fossil, bless its adorable little heart, wants to write global configuration
 # to $HOME/.fossil. AFAICT, there is no way to disable this functionality.
@ -19,5 +19,3 @@ popd

 # Just nuke the checkout file.
 rm $out/.fslckout
-
-stopNest
--- a/pkgs/build-support/fetchgit/builder.sh
+++ b/pkgs/build-support/fetchgit/builder.sh
@ -6,7 +6,7 @@
 if [ -e .attrs.sh ]; then source .attrs.sh; fi
 source $stdenv/setup

-header "exporting $url (rev $rev) into $out"
+echo "exporting $url (rev $rev) into $out"

 $SHELL $fetcher --builder --url "$url" --out "$out" --rev "$rev" \
  ${leaveDotGit:+--leave-dotGit} \
@ -18,4 +18,3 @@ $SHELL $fetcher --builder --url "$url" --out "$out" --rev "$rev" \
  ${branchName:+--branch-name "$branchName"}

 runHook postFetch
-stopNest
--- a/pkgs/build-support/fetchhg/builder.sh
+++ b/pkgs/build-support/fetchhg/builder.sh
@ -1,10 +1,8 @@
 if [ -e .attrs.sh ]; then source .attrs.sh; fi
 source $stdenv/setup
-header "getting $url${rev:+ ($rev)} into $out"
+echo "getting $url${rev:+ ($rev)} into $out"

 hg clone --insecure "$url" hg-clone

 hg archive -q$subrepoClause -y ${rev:+-r "$rev"} --cwd hg-clone $out
 rm -f $out/.hg_archival.txt
-
-stopNest
--- a/pkgs/build-support/fetchmtn/builder.sh
+++ b/pkgs/build-support/fetchmtn/builder.sh
@ -8,7 +8,7 @@ if ! [ -f "$cacheDB" ]; then
    mtn --db "$cacheDB" db init
 fi

-header "getting revision $selector";
+echo "getting revision $selector";

 done=;
 for source in $dbs; do
@ -32,9 +32,7 @@ for source in $dbs; do
    fi;
 done;

-stopNest;
-
-header "checking out the revision $revision";
+echo "checking out the revision $revision";

 if test -n "$done"; then
    mtn checkout --db "$cacheDB" -r "$revision" "$out" -b "${branch}"
@ -43,10 +41,6 @@ else
    exit 1;
 fi;

-stopNest
-
-header "clearing _MTN in the output"
+echo "clearing _MTN in the output"

 rm -rf "$out/_MTN"
-
-stopNest
--- a/pkgs/build-support/fetchsvn/builder.sh
+++ b/pkgs/build-support/fetchsvn/builder.sh
@ -1,7 +1,7 @@
 if [ -e .attrs.sh ]; then source .attrs.sh; fi
 source $stdenv/setup

-header "exporting $url (r$rev) into $out"
+echo "exporting $url (r$rev) into $out"

 if test -n "$http_proxy"; then
    # Configure proxy
@ -22,5 +22,3 @@ fi;
 svn export --trust-server-cert --non-interactive \
    ${ignoreExternals:+--ignore-externals} ${ignoreKeywords:+--ignore-keywords} \
    -r "$rev" "$url" "$out"
-
-stopNest
--- a/pkgs/build-support/fetchsvnssh/builder.sh
+++ b/pkgs/build-support/fetchsvnssh/builder.sh
@ -1,7 +1,7 @@
 if [ -e .attrs.sh ]; then source .attrs.sh; fi
 source $stdenv/setup

-header "exporting $url (r$rev) into $out"
+echo "exporting $url (r$rev) into $out"

 if test "$sshSupport"; then
    export SVN_SSH="$openssh/bin/ssh"
@ -12,5 +12,3 @@ fi
 # whether the server is being spoofed --- only the cryptographic
 # hash of the output matters.
 expect -f $sshSubversion "$username" "$password" "$rev" "$url" $out
-
-stopNest
--- a/pkgs/build-support/fetchurl/builder.sh
+++ b/pkgs/build-support/fetchurl/builder.sh
@ -37,7 +37,7 @@ if [ -n "$downloadToTemp" ]; then downloadedFile="$TMPDIR/file"; fi
 tryDownload() {
    local url="$1"
    echo
-    header "trying $url"
+    echo "trying $url"
    local curlexit=18;

    success=
--- a/pkgs/build-support/pkg-config-wrapper/default.nix
+++ b/pkgs/build-support/pkg-config-wrapper/default.nix
@ -46,14 +46,11 @@ stdenv.mkDerivation {
  strictDeps = true;
  dontBuild = true;
  dontConfigure = true;
+  dontUnpack = true;

  # Additional flags passed to pkg-config.
  addFlags = lib.optional stdenv.targetPlatform.isStatic "--static";

-  unpackPhase = ''
-    src=$PWD
-  '';
-
  installPhase =
    ''
      mkdir -p $out/bin $out/nix-support
--- a/pkgs/build-support/release/debian-build.nix
+++ b/pkgs/build-support/release/debian-build.nix
@ -43,9 +43,8 @@ vmTools.runInLinuxImage (stdenv.mkDerivation (
      [ ! -f /etc/lsb-release ] || (source /etc/lsb-release; echo "OS release: $DISTRIB_DESCRIPTION")
      echo "System/kernel: $(uname -a)"
      if test -e /etc/debian_version; then echo "Debian release: $(cat /etc/debian_version)"; fi
-      header "installed Debian packages"
+      echo "installed Debian packages"
      dpkg-query --list
-      stopNest
    '';

    installPhase = ''
@ -73,11 +72,10 @@ vmTools.runInLinuxImage (stdenv.mkDerivation (
      [ "$(echo $out/debs/*.deb)" != "" ]

      for i in $out/debs/*.deb; do
-        header "Generated DEB package: $i"
+        echo "Generated DEB package: $i"
        dpkg-deb --info "$i"
        pkgName=$(dpkg-deb -W "$i" | awk '{print $1}')
        echo "file deb $i" >> $out/nix-support/hydra-build-products
-        stopNest
      done
      dpkg -i $out/debs/*.deb

--- a/pkgs/build-support/release/nix-build.nix
+++ b/pkgs/build-support/release/nix-build.nix
@ -74,10 +74,9 @@ stdenv.mkDerivation (
      if test -n "$succeedOnFailure"; then
          if test -n "$keepBuildDirectory"; then
              KEEPBUILDDIR="$out/`basename $TMPDIR`"
-              header "Copying build directory to $KEEPBUILDDIR"
+              echo "Copying build directory to $KEEPBUILDDIR"
              mkdir -p $KEEPBUILDDIR
              cp -R "$TMPDIR/"* $KEEPBUILDDIR
-              stopNest
          fi
      fi
    '';
--- a/pkgs/build-support/release/source-tarball.nix
+++ b/pkgs/build-support/release/source-tarball.nix
@ -64,10 +64,9 @@ stdenv.mkDerivation (
      if test -n "$succeedOnFailure"; then
          if test -n "$keepBuildDirectory"; then
              KEEPBUILDDIR="$out/`basename $TMPDIR`"
-              header "Copying build directory to $KEEPBUILDDIR"
+              echo "Copying build directory to $KEEPBUILDDIR"
              mkdir -p $KEEPBUILDDIR
              cp -R "$TMPDIR/"* $KEEPBUILDDIR
-              stopNest
          fi
      fi
    '';
--- a/pkgs/build-support/setup-hooks/audit-tmpdir.sh
+++ b/pkgs/build-support/setup-hooks/audit-tmpdir.sh
@ -13,7 +13,7 @@ auditTmpdir() {
    local dir="$1"
    [ -e "$dir" ] || return 0

-    header "checking for references to $TMPDIR/ in $dir..."
+    echo "checking for references to $TMPDIR/ in $dir..."

    local i
    find "$dir" -type f -print0 | while IFS= read -r -d $'\0' i; do
@ -36,6 +36,4 @@ auditTmpdir() {
        fi

    done
-
-    stopNest
 }
--- a/pkgs/build-support/setup-hooks/auto-patchelf.py
+++ b/pkgs/build-support/setup-hooks/auto-patchelf.py
@ -131,7 +131,14 @@ def populate_cache(initial: List[Path], recursive: bool =False) -> None:
            if not path.is_file():
                continue

+            # As an optimisation, resolve the symlinks here, as the target is unique
+            # XXX: (layus, 2022-07-25) is this really an optimisation in all cases ?
+            # It could make the rpath bigger or break the fragile precedence of $out.
            resolved = path.resolve()
+            # Do not use resolved paths when names do not match
+            if resolved.name != path.name:
+                resolved = path
+
            try:
                with open_elf(path) as elf:
                    osabi = get_osabi(elf)
--- a/pkgs/build-support/setup-hooks/canonicalize-jars.sh
+++ b/pkgs/build-support/setup-hooks/canonicalize-jars.sh
@ -6,12 +6,11 @@ fixupOutputHooks+=('if [ -z "$dontCanonicalizeJars" -a -e "$prefix" ]; then cano

 canonicalizeJarsIn() {
  local dir="$1"
-  header "canonicalizing jars in $dir"
+  echo "canonicalizing jars in $dir"
  dir="$(realpath -sm -- "$dir")"
  while IFS= read -rd '' f; do
    canonicalizeJar "$f"
  done < <(find -- "$dir" -type f -name '*.jar' -print0)
-  stopNest
 }

 source @canonicalize_jar@
--- a/pkgs/build-support/setup-hooks/make-binary-wrapper/default.nix
+++ b/pkgs/build-support/setup-hooks/make-binary-wrapper/default.nix
@ -10,6 +10,8 @@
 }:

 makeSetupHook {
+  name = "make-binary-wrapper-hook";
+
  deps = [ dieHook ]
    # https://github.com/NixOS/nixpkgs/issues/148189
    ++ lib.optional (stdenv.isDarwin && stdenv.isAarch64) cc;
--- a/pkgs/build-support/setup-hooks/make-symlinks-relative.sh
+++ b/pkgs/build-support/setup-hooks/make-symlinks-relative.sh
@ -6,8 +6,8 @@ postFixupHooks+=(_makeSymlinksRelative)
 _makeSymlinksRelative() {
    local symlinkTarget

-    if [ -n "${dontRewriteSymlinks-}" ]; then
-        return 0
+    if [ "${dontRewriteSymlinks-}" ] || [ ! -e "$prefix" ]; then
+       return
    fi

    while IFS= read -r -d $'\0' f; do
--- a/pkgs/build-support/setup-hooks/multiple-outputs.sh
+++ b/pkgs/build-support/setup-hooks/multiple-outputs.sh
@ -4,16 +4,32 @@ preFixupHooks+=(_multioutDocs)
 preFixupHooks+=(_multioutDevs)
 postFixupHooks+=(_multioutPropagateDev)

-# Assign the first string containing nonempty variable to the variable named $1
+# _assignFirst varName otherVarNames*
+#
+# Set the value of the variable named $varName to the first of otherVarNames
+# that refers to a non-empty variable name.
+#
+# If none of otherVarNames refers to a non-empty variable, the error message is
+# specific to this function's use case, which is setting up the output variables.
 _assignFirst() {
    local varName="$1"
    local REMOVE=REMOVE # slightly hacky - we allow REMOVE (i.e. not a variable name)
    shift
-    while (( $# )); do
-        if [ -n "${!1-}" ]; then eval "${varName}"="$1"; return; fi
-        shift
+    for var in "$@"; do
+        if [ -n "${!var-}" ]; then eval "${varName}"="${var}"; return; fi
    done
-    echo "Error: _assignFirst found no valid variant!"
+    echo
+    echo "error: _assignFirst: could not find a non-empty variable to assign to ${varName}."
+    echo "       The following variables were all unset or empty:"
+    echo "           $*"
+    if [ -z "${out:-}" ]; then
+        echo '       If you do not want an "out" output in your derivation, make sure to define'
+        echo '       the other specific required outputs. This can be achieved by picking one'
+        echo "       of the above as an output."
+        echo '       You do not have to remove "out" if you want to have a different default'
+        echo '       output, because the first output is taken as a default.'
+        echo
+    fi
    return 1 # none found
 }

--- a/pkgs/build-support/setup-hooks/patch-shebangs.sh
+++ b/pkgs/build-support/setup-hooks/patch-shebangs.sh
@ -100,8 +100,6 @@ patchShebangs() {
            fi
        fi
    done < <(find "$@" -type f -perm -0100 -print0)
-
-    stopNest
 }

 patchShebangsAuto () {
--- a/pkgs/build-support/setup-hooks/postgresql-test-hook/postgresql-test-hook.sh
+++ b/pkgs/build-support/setup-hooks/postgresql-test-hook/postgresql-test-hook.sh
@ -53,7 +53,7 @@ EOF
    echo >&2 'initdb not found. Did you add postgresql to the nativeCheckInputs?'
    false
  fi
-  header 'initializing postgresql'
+  echo 'initializing postgresql'
  initdb -U postgres

  # Move the socket
@ -65,10 +65,10 @@ EOF
    echo "listen_addresses = ''" >>"$PGDATA/postgresql.conf"
  fi

-  header 'starting postgresql'
+  echo 'starting postgresql'
  eval "${postgresqlStartCommands:-pg_ctl start}"

-  header 'setting up postgresql'
+  echo 'setting up postgresql'
  eval "$postgresqlTestSetupCommands"

  runHook postgresqlTestSetupPost
@ -76,6 +76,6 @@ EOF
 }

 postgresqlStop() {
-  header 'stopping postgresql'
+  echo 'stopping postgresql'
  pg_ctl stop
 }
--- a/pkgs/build-support/setup-hooks/separate-debug-info.sh
+++ b/pkgs/build-support/setup-hooks/separate-debug-info.sh
@ -26,7 +26,7 @@ _separateDebugInfo() {
        fi

        # Extract the debug info.
-        header "separating debug info from $i (build ID $id)"
+        echo "separating debug info from $i (build ID $id)"
        mkdir -p "$dst/${id:0:2}"

        # This may fail, e.g. if the binary is for a different
--- a/pkgs/build-support/setup-hooks/strip.sh
+++ b/pkgs/build-support/setup-hooks/strip.sh
@ -36,7 +36,7 @@ _doStrip() {
        local -n ranlibCmd="${ranlibCmds[$i]}"

        # `dontStrip` disables them all
-        if [[ "${dontStrip-}" || "${flag-}" ]] || ! type -f "${stripCmd-}" 2>/dev/null
+        if [[ "${dontStrip-}" || "${flag-}" ]] || ! type -f "${stripCmd-}" 2>/dev/null 1>&2
        then continue; fi

        stripDirs "$stripCmd" "$ranlibCmd" "$debugDirList" "${stripDebugFlags[*]:--S}"
--- a/pkgs/build-support/trivial-builders.nix
+++ b/pkgs/build-support/trivial-builders.nix
@ -546,6 +546,7 @@ rec {
   * # writes a Linux-exclusive setup hook where @bash@ myscript.sh is substituted for the
   * # bash interpreter.
   * myhellohookSub = makeSetupHook {
+   *                 name = "myscript-hook";
   *                 deps = [ hello ];
   *                 substitutions = { bash = "${pkgs.bash}/bin/bash"; };
   *                 meta.platforms = lib.platforms.linux;
@ -553,13 +554,21 @@ rec {
   *
   * # setup hook with a package test
   * myhellohookTested = makeSetupHook {
+   *                 name = "myscript-hook";
   *                 deps = [ hello ];
   *                 substitutions = { bash = "${pkgs.bash}/bin/bash"; };
   *                 meta.platforms = lib.platforms.linux;
   *                 passthru.tests.greeting = callPackage ./test { };
   *               } ./myscript.sh;
   */
-  makeSetupHook = { name ? "hook", deps ? [], substitutions ? {}, meta ? {}, passthru ? {} }: script:
+  makeSetupHook =
+    { name ? lib.warn "calling makeSetupHook without passing a name is deprecated." "hook"
+    , deps ? []
+    , substitutions ? {}
+    , meta ? {}
+    , passthru ? {}
+    }:
+    script:
    runCommand name
      (substitutions // {
        inherit meta;
--- a/pkgs/build-support/vm/default.nix
+++ b/pkgs/build-support/vm/default.nix
@ -527,9 +527,8 @@ rec {
      echo "System/kernel: $(uname -a)"
      if test -e /etc/fedora-release; then echo "Fedora release: $(cat /etc/fedora-release)"; fi
      if test -e /etc/SuSE-release; then echo "SUSE release: $(cat /etc/SuSE-release)"; fi
-      header "installed RPM packages"
+      echo "installed RPM packages"
      rpm -qa --qf "%{Name}-%{Version}-%{Release} (%{Arch}; %{Distribution}; %{Vendor})\n"
-      stopNest
    '';

    buildPhase = ''
@ -559,9 +558,8 @@ rec {
      find $rpmout -name "*.rpm" -exec cp {} $out/$outDir \;

      for i in $out/$outDir/*.rpm; do
-        header "Generated RPM/SRPM: $i"
+        echo "Generated RPM/SRPM: $i"
        rpm -qip $i
-        stopNest
      done

      eval "$postInstall"
--- a/pkgs/desktops/xfce/default.nix
+++ b/pkgs/desktops/xfce/default.nix
@ -25,7 +25,9 @@ makeScopeWithSplicing

      mkXfceDerivation = callPackage ./mkXfceDerivation.nix { };

-      automakeAddFlags = pkgs.makeSetupHook { } ./automakeAddFlags.sh;
+      automakeAddFlags = pkgs.makeSetupHook {
+        name = "xfce-automake-add-flags-hook";
+      } ./automakeAddFlags.sh;

      #### CORE

--- a/pkgs/development/compilers/chicken/4/fetchegg/builder.sh
+++ b/pkgs/development/compilers/chicken/4/fetchegg/builder.sh
@ -1,10 +1,8 @@
 if [ -e .attrs.sh ]; then source .attrs.sh; fi
 source $stdenv/setup

-header "exporting egg ${eggName} (version $version) into $out"
+echo "exporting egg ${eggName} (version $version) into $out"

 mkdir -p $out
 chicken-install -r "${eggName}:${version}"
 cp -r ${eggName}/* $out/
-
-stopNest
--- a/pkgs/development/compilers/chicken/5/fetchegg/builder.sh
+++ b/pkgs/development/compilers/chicken/5/fetchegg/builder.sh
@ -1,11 +1,9 @@
 if [ -e .attrs.sh ]; then source .attrs.sh; fi
 source $stdenv/setup

-header "exporting egg ${eggName} (version $version) into $out"
+echo "exporting egg ${eggName} (version $version) into $out"

 mkdir -p $out
 CHICKEN_EGG_CACHE=. chicken-install -r "${eggName}:${version}"
 rm ${eggName}/{STATUS,TIMESTAMP}
 cp -r ${eggName}/* $out/
-
-stopNest
--- a/pkgs/development/compilers/dmd/generic.nix
+++ b/pkgs/development/compilers/dmd/generic.nix
@ -151,6 +151,13 @@ stdenv.mkDerivation rec {
    git
  ];

+  # Workaround cc-wrapper's --sysroot= value for `staging-next`: it
+  # breaks library lookup via RUNPATH:
+  #   ld: warning: libm.so.6, needed by ./generated/linux/release/64/lib.so, not found (try using -rpath or -rpath-link)
+  #   ld: /build/druntime/generated/linux/release/64/libdruntime.so: undefined reference to `log10@GLIBC_2.2.5'
+  # TODO(trofi): remove the workaround once cc-wrapper is fixed.
+  NIX_CFLAGS_COMPILE = [ "--sysroot=/" ];
+
  buildInputs = [
    curl
    tzdata
--- a/pkgs/development/compilers/gcc/10/default.nix
+++ b/pkgs/development/compilers/gcc/10/default.nix
@ -51,8 +51,14 @@ let majorVersion = "10";

    inherit (stdenv) buildPlatform hostPlatform targetPlatform;

-    patches = [ ]
-      ++ optional (targetPlatform != hostPlatform) ../libstdc++-target.patch
+    patches = [
+      # Fix https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80431
+      (fetchurl {
+        name = "fix-bug-80431.patch";
+        url = "https://gcc.gnu.org/git/?p=gcc.git;a=patch;h=de31f5445b12fd9ab9969dc536d821fe6f0edad0";
+        sha256 = "0sd52c898msqg7m316zp0ryyj7l326cjcn2y19dcxqp15r74qj0g";
+      })
+    ] ++ optional (targetPlatform != hostPlatform) ../libstdc++-target.patch
      ++ optional noSysDirs ../no-sys-dirs.patch
      ++ optional (noSysDirs && hostPlatform.isRiscV) ../no-sys-dirs-riscv.patch
      /* ++ optional (hostPlatform != buildPlatform) (fetchpatch { # XXX: Refine when this should be applied
@ -222,6 +228,7 @@ stdenv.mkDerivation ({
  };

  targetConfig = if targetPlatform != hostPlatform then targetPlatform.config else null;
+  targetPlatformConfig = targetPlatform.config;

  buildFlags = optional
    (targetPlatform == hostPlatform && hostPlatform == buildPlatform)
--- a/pkgs/development/compilers/gcc/11/default.nix
+++ b/pkgs/development/compilers/gcc/11/default.nix
@ -51,8 +51,14 @@ let majorVersion = "11";

    inherit (stdenv) buildPlatform hostPlatform targetPlatform;

-    patches =
-         optional (targetPlatform != hostPlatform) ../libstdc++-target.patch
+    patches = [
+      # Fix https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80431
+      (fetchurl {
+        name = "fix-bug-80431.patch";
+        url = "https://gcc.gnu.org/git/?p=gcc.git;a=patch;h=de31f5445b12fd9ab9969dc536d821fe6f0edad0";
+        sha256 = "0sd52c898msqg7m316zp0ryyj7l326cjcn2y19dcxqp15r74qj0g";
+      })
+    ] ++ optional (targetPlatform != hostPlatform) ../libstdc++-target.patch
      ++ optional noSysDirs ../no-sys-dirs.patch
      ++ optional (noSysDirs && hostPlatform.isRiscV) ../no-sys-dirs-riscv.patch
      /* ++ optional (hostPlatform != buildPlatform) (fetchpatch { # XXX: Refine when this should be applied
@ -228,6 +234,7 @@ stdenv.mkDerivation ({
  };

  targetConfig = if targetPlatform != hostPlatform then targetPlatform.config else null;
+  targetPlatformConfig = targetPlatform.config;

  buildFlags = optional
    (targetPlatform == hostPlatform && hostPlatform == buildPlatform)
--- a/pkgs/development/compilers/gcc/12/default.nix
+++ b/pkgs/development/compilers/gcc/12/default.nix
@ -270,6 +270,7 @@ stdenv.mkDerivation ({
  };

  targetConfig = if targetPlatform != hostPlatform then targetPlatform.config else null;
+  targetPlatformConfig = targetPlatform.config;

  buildFlags = optional
    (targetPlatform == hostPlatform && hostPlatform == buildPlatform)
--- a/pkgs/development/compilers/gcc/4.8/default.nix
+++ b/pkgs/development/compilers/gcc/4.8/default.nix
@ -227,6 +227,7 @@ stdenv.mkDerivation ({
  };

  targetConfig = if targetPlatform != hostPlatform then targetPlatform.config else null;
+  targetPlatformConfig = targetPlatform.config;

  buildFlags = optional
    (targetPlatform == hostPlatform && hostPlatform == buildPlatform)
--- a/pkgs/development/compilers/gcc/4.9/default.nix
+++ b/pkgs/development/compilers/gcc/4.9/default.nix
@ -247,6 +247,7 @@ stdenv.mkDerivation ({
  };

  targetConfig = if targetPlatform != hostPlatform then targetPlatform.config else null;
+  targetPlatformConfig = targetPlatform.config;

  buildFlags = optional
    (targetPlatform == hostPlatform && hostPlatform == buildPlatform)
--- a/pkgs/development/compilers/gcc/6/default.nix
+++ b/pkgs/development/compilers/gcc/6/default.nix
@ -64,6 +64,13 @@ let majorVersion = "6";

    patches = optionals (!stdenv.targetPlatform.isRedox) [
      ../use-source-date-epoch.patch ./0001-Fix-build-for-glibc-2.31.patch
+
+      # Fix https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80431
+      (fetchurl {
+        name = "fix-bug-80431.patch";
+        url = "https://gcc.gnu.org/git/?p=gcc.git;a=patch;h=de31f5445b12fd9ab9969dc536d821fe6f0edad0";
+        sha256 = "0sd52c898msqg7m316zp0ryyj7l326cjcn2y19dcxqp15r74qj0g";
+      })
    ] ++ optional (targetPlatform != hostPlatform) ../libstdc++-target.patch
      ++ optional noSysDirs ../no-sys-dirs.patch
      ++ optional langAda ../gnat-cflags.patch
@ -258,6 +265,7 @@ stdenv.mkDerivation ({
  };

  targetConfig = if targetPlatform != hostPlatform then targetPlatform.config else null;
+  targetPlatformConfig = targetPlatform.config;

  buildFlags = optional
    (targetPlatform == hostPlatform && hostPlatform == buildPlatform)
--- a/pkgs/development/compilers/gcc/7/default.nix
+++ b/pkgs/development/compilers/gcc/7/default.nix
@ -56,6 +56,13 @@ let majorVersion = "7";
        ./gcc8-asan-glibc-2.34.patch

        ./0001-Fix-build-for-glibc-2.31.patch
+
+        # Fix https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80431
+        (fetchurl {
+          name = "fix-bug-80431.patch";
+          url = "https://gcc.gnu.org/git/?p=gcc.git;a=patch;h=de31f5445b12fd9ab9969dc536d821fe6f0edad0";
+          sha256 = "0sd52c898msqg7m316zp0ryyj7l326cjcn2y19dcxqp15r74qj0g";
+        })
      ]
      ++ optional (targetPlatform != hostPlatform) ../libstdc++-target.patch
      ++ optionals targetPlatform.isNetBSD [
@ -226,6 +233,7 @@ stdenv.mkDerivation ({
  ;

  targetConfig = if targetPlatform != hostPlatform then targetPlatform.config else null;
+  targetPlatformConfig = targetPlatform.config;

  buildFlags = optional
    (targetPlatform == hostPlatform && hostPlatform == buildPlatform)
--- a/pkgs/development/compilers/gcc/8/default.nix
+++ b/pkgs/development/compilers/gcc/8/default.nix
@ -46,8 +46,14 @@ let majorVersion = "8";

    inherit (stdenv) buildPlatform hostPlatform targetPlatform;

-    patches =
-         optional (targetPlatform != hostPlatform) ../libstdc++-target.patch
+    patches = [
+      # Fix https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80431
+      (fetchurl {
+        name = "fix-bug-80431.patch";
+        url = "https://gcc.gnu.org/git/?p=gcc.git;a=patch;h=de31f5445b12fd9ab9969dc536d821fe6f0edad0";
+        sha256 = "0sd52c898msqg7m316zp0ryyj7l326cjcn2y19dcxqp15r74qj0g";
+      })
+    ] ++ optional (targetPlatform != hostPlatform) ../libstdc++-target.patch
      ++ optional targetPlatform.isNetBSD ../libstdc++-netbsd-ctypes.patch
      ++ optional noSysDirs ../no-sys-dirs.patch
      /* ++ optional (hostPlatform != buildPlatform) (fetchpatch { # XXX: Refine when this should be applied
@ -206,6 +212,7 @@ stdenv.mkDerivation ({
  };

  targetConfig = if targetPlatform != hostPlatform then targetPlatform.config else null;
+  targetPlatformConfig = targetPlatform.config;

  buildFlags = optional
    (targetPlatform == hostPlatform && hostPlatform == buildPlatform)
--- a/pkgs/development/compilers/gcc/9/default.nix
+++ b/pkgs/development/compilers/gcc/9/default.nix
@ -55,9 +55,14 @@ let majorVersion = "9";

    inherit (stdenv) buildPlatform hostPlatform targetPlatform;

-    patches =
-      [ ]
-      ++ optional (targetPlatform != hostPlatform) ../libstdc++-target.patch
+    patches = [
+      # Fix https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80431
+      (fetchurl {
+        name = "fix-bug-80431.patch";
+        url = "https://gcc.gnu.org/git/?p=gcc.git;a=patch;h=de31f5445b12fd9ab9969dc536d821fe6f0edad0";
+        sha256 = "0sd52c898msqg7m316zp0ryyj7l326cjcn2y19dcxqp15r74qj0g";
+      })
+    ] ++ optional (targetPlatform != hostPlatform) ../libstdc++-target.patch
      ++ optional targetPlatform.isNetBSD ../libstdc++-netbsd-ctypes.patch
      ++ optional noSysDirs ../no-sys-dirs.patch
      ++ optional (noSysDirs && hostPlatform.isRiscV) ../no-sys-dirs-riscv-gcc9.patch
@ -221,6 +226,7 @@ stdenv.mkDerivation ({
  };

  targetConfig = if targetPlatform != hostPlatform then targetPlatform.config else null;
+  targetPlatformConfig = targetPlatform.config;

  buildFlags = optional
    (targetPlatform == hostPlatform && hostPlatform == buildPlatform)
--- a/pkgs/development/compilers/gcc/builder.sh
+++ b/pkgs/development/compilers/gcc/builder.sh
@ -203,6 +203,17 @@ preInstall() {
        ln -s lib "$out/${targetConfig}/lib32"
        ln -s lib "${!outputLib}/${targetConfig}/lib32"
    fi
+
+    # cc-wrappers uses --sysroot=/nix/store/does/not/exist as a way to
+    # drop default sysheaders search path. Unfortunately that switches
+    # clang++ into searching libraries in gcc in cross-compiler paths:
+    #   from ${!outputLib}/lib (native)
+    #   to ${!outputLib}/${targetPlatformConfig}/lib
+    # We create the symlink to make both native and cross paths
+    # available even if the toolchain is not the cross-compiler.
+    if [ ! -e ${!outputLib}/${targetPlatformConfig} ] ; then
+        ln -s . ${!outputLib}/${targetPlatformConfig}
+    fi
 }


@ -240,25 +251,6 @@ postInstall() {
    # More dependencies with the previous gcc or some libs (gccbug stores the build command line)
    rm -rf $out/bin/gccbug

-    if [[ buildConfig == *"linux"* ]]; then
-        # Take out the bootstrap-tools from the rpath, as it's not needed at all having $out
-        for i in $(find "$out"/libexec/gcc/*/*/* -type f -a \! -name '*.la'); do
-            PREV_RPATH=`patchelf --print-rpath "$i"`
-            NEW_RPATH=`echo "$PREV_RPATH" | sed 's,:[^:]*bootstrap-tools/lib,,g'`
-            patchelf --set-rpath "$NEW_RPATH" "$i" && echo OK
-        done
-    fi
-
-    if [[ targetConfig == *"linux"* ]]; then
-        # For some reason, when building for linux on darwin, the libs retain
-        # RPATH to $out.
-        for i in "$lib"/"$targetConfig"/lib/{libtsan,libasan,libubsan}.so.*.*.*; do
-            PREV_RPATH=`patchelf --print-rpath "$i"`
-            NEW_RPATH=`echo "$PREV_RPATH" | sed "s,:${out}[^:]*,,g"`
-            patchelf --set-rpath "$NEW_RPATH" "$i" && echo OK
-        done
-    fi
-
    if type "install_name_tool"; then
        for i in "${!outputLib}"/lib/*.*.dylib "${!outputLib}"/lib/*.so.[0-9]; do
            install_name_tool -id "$i" "$i" || true
--- a/pkgs/development/compilers/go/1.19.nix
+++ b/pkgs/development/compilers/go/1.19.nix
@ -46,11 +46,11 @@ let
 in
 stdenv.mkDerivation rec {
  pname = "go";
-  version = "1.19.4";
+  version = "1.19.5";

  src = fetchurl {
    url = "https://go.dev/dl/go${version}.src.tar.gz";
-    sha256 = "sha256-7adNtKxJSACj5m7nhOSVv7ubjlNd+SSosBsagCi382g=";
+    sha256 = "sha256-jkhujoWigfxc4/C+3FudLb9idtfbCyXT7ANPMT2gN18=";
  };

  strictDeps = true;
--- a/pkgs/development/compilers/rust/cargo-auditable-cargo-wrapper.nix
+++ b/pkgs/development/compilers/rust/cargo-auditable-cargo-wrapper.nix
@ -1,12 +1,9 @@
-{ lib, writeShellApplication, cargo, cargo-auditable }:
+{ lib, writeShellScriptBin, cargo, cargo-auditable }:

-(writeShellApplication {
-  name = "cargo";
-  runtimeInputs = [ cargo cargo-auditable ];
-  text = ''
-    CARGO_AUDITABLE_IGNORE_UNSUPPORTED=1 cargo auditable "$@"
-  '';
-}) // {
+(writeShellScriptBin "cargo" ''
+  export PATH="${lib.makeBinPath [ cargo cargo-auditable ]}:$PATH"
+  CARGO_AUDITABLE_IGNORE_UNSUPPORTED=1 exec cargo auditable "$@"
+'') // {
  meta = cargo-auditable.meta // {
    mainProgram = "cargo";
  };
--- a/pkgs/development/compilers/swift/compiler/default.nix
+++ b/pkgs/development/compilers/swift/compiler/default.nix
@ -0,0 +1,686 @@
+{ lib
+, stdenv
+, callPackage
+, cmake
+, coreutils
+, gnugrep
+, perl
+, ninja
+, pkg-config
+, clang
+, bintools
+, python3
+, git
+, fetchpatch
+, makeWrapper
+, gnumake
+, file
+, runCommand
+, writeShellScriptBin
+# For lldb
+, libedit
+, ncurses
+, swig
+, libxml2
+# Linux-specific
+, glibc
+, libuuid
+# Darwin-specific
+, substituteAll
+, fixDarwinDylibNames
+, runCommandLocal
+, xcbuild
+, cctools # libtool
+, sigtool
+, DarwinTools
+, CoreServices
+, Foundation
+, Combine
+, MacOSX-SDK
+, CLTools_Executables
+}:
+
+let
+
+  inherit (stdenv) hostPlatform targetPlatform;
+
+  sources = callPackage ../sources.nix { };
+
+  # Tools invoked by swift at run-time.
+  runtimeDeps = lib.optionals stdenv.isDarwin [
+    # libtool is used for static linking. This is part of cctools, but adding
+    # that as a build input puts an unwrapped linker in PATH, and breaks
+    # builds. This small derivation exposes just libtool.
+    # NOTE: The same applies to swift-driver, but that is currently always
+    # invoked via the old `swift` / `swiftc`. May change in the future.
+    (runCommandLocal "libtool" { } ''
+      mkdir -p $out/bin
+      ln -s ${cctools}/bin/libtool $out/bin/libtool
+    '')
+  ];
+
+  # There are apparently multiple naming conventions on Darwin. Swift uses the
+  # xcrun naming convention. See `configure_sdk_darwin` calls in CMake files.
+  swiftOs = if targetPlatform.isDarwin
+    then {
+      "macos" = "macosx";
+      "ios" = "iphoneos";
+      #iphonesimulator
+      #appletvos
+      #appletvsimulator
+      #watchos
+      #watchsimulator
+    }.${targetPlatform.darwinPlatform}
+      or (throw "Cannot build Swift for target Darwin platform '${targetPlatform.darwinPlatform}'")
+    else targetPlatform.parsed.kernel.name;
+
+  # Apple Silicon uses a different CPU name in the target triple.
+  swiftArch = if stdenv.isDarwin && stdenv.isAarch64 then "arm64"
+    else targetPlatform.parsed.cpu.name;
+
+  # On Darwin, a `.swiftmodule` is a subdirectory in `lib/swift/<OS>`,
+  # containing binaries for supported archs. On other platforms, binaries are
+  # installed to `lib/swift/<OS>/<ARCH>`. Note that our setup-hook also adds
+  # `lib/swift` for convenience.
+  swiftLibSubdir = "lib/swift/${swiftOs}";
+  swiftModuleSubdir = if hostPlatform.isDarwin
+    then "lib/swift/${swiftOs}"
+    else "lib/swift/${swiftOs}/${swiftArch}";
+
+  # And then there's also a separate subtree for statically linked  modules.
+  toStaticSubdir = lib.replaceStrings [ "/swift/" ] [ "/swift_static/" ];
+  swiftStaticLibSubdir = toStaticSubdir swiftLibSubdir;
+  swiftStaticModuleSubdir = toStaticSubdir swiftModuleSubdir;
+
+  # This matches _SWIFT_DEFAULT_COMPONENTS, with specific components disabled.
+  swiftInstallComponents = [
+    "autolink-driver"
+    "compiler"
+    # "clang-builtin-headers"
+    "stdlib"
+    "sdk-overlay"
+    "parser-lib"
+    "static-mirror-lib"
+    "editor-integration"
+    # "tools"
+    # "testsuite-tools"
+    "toolchain-tools"
+    "toolchain-dev-tools"
+    "license"
+    (if stdenv.isDarwin then "sourcekit-xpc-service" else "sourcekit-inproc")
+    "swift-remote-mirror"
+    "swift-remote-mirror-headers"
+  ];
+
+  # Build a tool used during the build to create a custom clang wrapper, with
+  # which we wrap the clang produced by the swift build.
+  #
+  # This is used in a `POST_BUILD` for the CMake target, so we rename the
+  # actual clang to clang-unwrapped, then put the wrapper in place.
+  #
+  # We replace the `exec ...` command with `exec -a "$0"` in order to
+  # preserve $0 for clang. This is because, unlike Nix, we don't have
+  # separate wrappers for clang/clang++, and clang uses $0 to detect C++.
+  #
+  # Similarly, the C++ detection in the wrapper itself also won't work for us,
+  # so we base it on $0 as well.
+  makeClangWrapper = writeShellScriptBin "nix-swift-make-clang-wrapper" ''
+    set -euo pipefail
+
+    targetFile="$1"
+    unwrappedClang="$targetFile-unwrapped"
+
+    mv "$targetFile" "$unwrappedClang"
+    sed < '${clang}/bin/clang' > "$targetFile" \
+      -e 's|^\s*exec|exec -a "$0"|g' \
+      -e 's|^\[\[ "${clang.cc}/bin/clang" = \*++ ]]|[[ "$0" = *++ ]]|' \
+      -e "s|${clang.cc}/bin/clang|$unwrappedClang|g"
+    chmod a+x "$targetFile"
+  '';
+
+  # Create a tool used during the build to create a custom swift wrapper for
+  # each of the swift executables produced by the build.
+  #
+  # The build produces several `swift-frontend` executables during
+  # bootstrapping. Each of these has numerous aliases via symlinks, and the
+  # executable uses $0 to detect what tool is called.
+  wrapperParams = {
+    inherit bintools;
+    default_cc_wrapper = clang; # Instead of `@out@` in the original.
+    coreutils_bin = lib.getBin coreutils;
+    gnugrep_bin = gnugrep;
+    suffixSalt = lib.replaceStrings ["-" "."] ["_" "_"] targetPlatform.config;
+    use_response_file_by_default = 1;
+    swiftDriver = "";
+    # NOTE: @prog@ needs to be filled elsewhere.
+  };
+  swiftWrapper = runCommand "swift-wrapper.sh" wrapperParams ''
+    substituteAll '${../wrapper/wrapper.sh}' "$out"
+  '';
+  makeSwiftcWrapper = writeShellScriptBin "nix-swift-make-swift-wrapper" ''
+    set -euo pipefail
+
+    targetFile="$1"
+    unwrappedSwift="$targetFile-unwrapped"
+
+    mv "$targetFile" "$unwrappedSwift"
+    sed < '${swiftWrapper}' > "$targetFile" \
+      -e "s|@prog@|'$unwrappedSwift'|g" \
+      -e 's|exec "$prog"|exec -a "$0" "$prog"|g'
+    chmod a+x "$targetFile"
+  '';
+
+  # On Darwin, we need to use BOOTSTRAPPING-WITH-HOSTLIBS because of ABI
+  # stability, and have to provide the definitions for the system stdlib.
+  appleSwiftCore = stdenv.mkDerivation {
+    name = "apple-swift-core";
+    dontUnpack = true;
+
+    installPhase = ''
+      mkdir -p $out/lib/swift
+      cp -r \
+        "${MacOSX-SDK}/usr/lib/swift/Swift.swiftmodule" \
+        "${MacOSX-SDK}/usr/lib/swift/libswiftCore.tbd" \
+        $out/lib/swift/
+    '';
+  };
+
+in stdenv.mkDerivation {
+  pname = "swift";
+  inherit (sources) version;
+
+  outputs = [ "out" "lib" "dev" "doc" "man" ];
+
+  nativeBuildInputs = [
+    cmake
+    git
+    ninja
+    perl # pod2man
+    pkg-config
+    python3
+    makeWrapper
+    makeClangWrapper
+    makeSwiftcWrapper
+  ]
+    ++ lib.optionals stdenv.isDarwin [
+      xcbuild
+      sigtool # codesign
+      DarwinTools # sw_vers
+      fixDarwinDylibNames
+    ];
+
+  buildInputs = [
+    # For lldb
+    python3
+    swig
+    libxml2
+  ]
+    ++ lib.optionals stdenv.isLinux [
+      libuuid
+    ]
+    ++ lib.optionals stdenv.isDarwin [
+      CoreServices
+      Foundation
+      Combine
+    ];
+
+  # This is a partial reimplementation of our setup hook. Because we reuse
+  # the Swift wrapper for the Swift build itself, we need to do some of the
+  # same preparation.
+  postHook = ''
+    for pkg in "''${pkgsHostTarget[@]}" '${clang.libc}'; do
+      for subdir in ${swiftModuleSubdir} ${swiftStaticModuleSubdir} lib/swift; do
+        if [[ -d "$pkg/$subdir" ]]; then
+          export NIX_SWIFTFLAGS_COMPILE+=" -I $pkg/$subdir"
+        fi
+      done
+      for subdir in ${swiftLibSubdir} ${swiftStaticLibSubdir} lib/swift; do
+        if [[ -d "$pkg/$subdir" ]]; then
+          export NIX_LDFLAGS+=" -L $pkg/$subdir"
+        fi
+      done
+    done
+  '';
+
+  # We invoke cmakeConfigurePhase multiple times, but only need this once.
+  dontFixCmake = true;
+  # We setup custom build directories.
+  dontUseCmakeBuildDir = true;
+
+  unpackPhase = let
+    copySource = repo: "cp -r ${sources.${repo}} ${repo}";
+  in ''
+    mkdir src
+    cd src
+
+    ${copySource "swift-cmark"}
+    ${copySource "llvm-project"}
+    ${copySource "swift"}
+    ${copySource "swift-experimental-string-processing"}
+    ${lib.optionalString
+      (!stdenv.isDarwin)
+      (copySource "swift-corelibs-libdispatch")}
+
+    chmod -R u+w .
+  '';
+
+  patchPhase = ''
+    # Just patch all the things for now, we can focus this later.
+    # TODO: eliminate use of env.
+    find -type f -print0 | xargs -0 sed -i \
+    ${lib.optionalString stdenv.isDarwin
+      "-e 's|/usr/libexec/PlistBuddy|${xcbuild}/bin/PlistBuddy|g'"} \
+      -e 's|/usr/bin/env|${coreutils}/bin/env|g' \
+      -e 's|/usr/bin/make|${gnumake}/bin/make|g' \
+      -e 's|/bin/mkdir|${coreutils}/bin/mkdir|g' \
+      -e 's|/bin/cp|${coreutils}/bin/cp|g' \
+      -e 's|/usr/bin/file|${file}/bin/file|g'
+
+    patch -p1 -d swift -i ${./patches/swift-wrap.patch}
+    patch -p1 -d swift -i ${./patches/swift-nix-resource-root.patch}
+    patch -p1 -d swift -i ${./patches/swift-linux-fix-linking.patch}
+    patch -p1 -d swift -i ${substituteAll {
+      src = ./patches/swift-darwin-plistbuddy-workaround.patch;
+      inherit swiftArch;
+    }}
+    patch -p1 -d swift -i ${substituteAll {
+      src = ./patches/swift-prevent-sdk-dirs-warning.patch;
+      inherit (builtins) storeDir;
+    }}
+    substituteInPlace swift/cmake/modules/SwiftConfigureSDK.cmake \
+      --replace '/usr/include' "${stdenv.cc.libc_dev}/include"
+
+    # This patch needs to know the lib output location, so must be substituted
+    # in the same derivation as the compiler.
+    storeDir="${builtins.storeDir}" \
+      substituteAll ${./patches/swift-separate-lib.patch} $TMPDIR/swift-separate-lib.patch
+    patch -p1 -d swift -i $TMPDIR/swift-separate-lib.patch
+
+    patch -p1 -d llvm-project/llvm -i ${./patches/llvm-module-cache.patch}
+
+    patch -p1 -d llvm-project/clang -i ${./patches/clang-toolchain-dir.patch}
+    patch -p1 -d llvm-project/clang -i ${./patches/clang-wrap.patch}
+    patch -p1 -d llvm-project/clang -i ${../../llvm/14/clang/purity.patch}
+    patch -p2 -d llvm-project/clang -i ${fetchpatch {
+      name = "clang-cmake-fix-interpreter.patch";
+      url = "https://github.com/llvm/llvm-project/commit/b5eaf500f2441eff2277ea2973878fb1f171fd0a.patch";
+      sha256 = "1rma1al0rbm3s3ql6bnvbcighp74lri1lcrwbyacgdqp80fgw1b6";
+    }}
+
+    ${lib.optionalString stdenv.isLinux ''
+    substituteInPlace llvm-project/clang/lib/Driver/ToolChains/Linux.cpp \
+      --replace 'SysRoot + "/lib' '"${glibc}/lib" "' \
+      --replace 'SysRoot + "/usr/lib' '"${glibc}/lib" "' \
+      --replace 'LibDir = "lib";' 'LibDir = "${glibc}/lib";' \
+      --replace 'LibDir = "lib64";' 'LibDir = "${glibc}/lib";' \
+      --replace 'LibDir = X32 ? "libx32" : "lib64";' 'LibDir = "${glibc}/lib";'
+
+    # uuid.h is not part of glibc, but of libuuid.
+    sed -i 's|''${GLIBC_INCLUDE_PATH}/uuid/uuid.h|${libuuid.dev}/include/uuid/uuid.h|' \
+      swift/stdlib/public/Platform/glibc.modulemap.gyb
+    ''}
+
+    # Remove tests for cross compilation, which we don't currently support.
+    rm swift/test/Interop/Cxx/class/constructors-copy-irgen.swift
+    rm swift/test/Interop/Cxx/class/constructors-irgen.swift
+
+    # TODO: consider fixing and re-adding. This test fails due to a non-standard "install_prefix".
+    rm swift/validation-test/Python/build_swift.swift
+
+    # We cannot handle the SDK location being in "Weird Location" due to Nix isolation.
+    rm swift/test/DebugInfo/compiler-flags.swift
+
+    # TODO: Fix issue with ld.gold invoked from script finding crtbeginS.o and crtendS.o.
+    rm swift/test/IRGen/ELF-remove-autolink-section.swift
+
+    # The following two tests fail because we use don't use the bundled libicu:
+    # [SOURCE_DIR/utils/build-script] ERROR: can't find source directory for libicu (tried /build/src/icu)
+    rm swift/validation-test/BuildSystem/default_build_still_performs_epilogue_opts_after_split.test
+    rm swift/validation-test/BuildSystem/test_early_swift_driver_and_infer.swift
+
+    # TODO: This test fails for some unknown reason
+    rm swift/test/Serialization/restrict-swiftmodule-to-revision.swift
+
+    # This test was flaky in ofborg, see #186476
+    rm swift/test/AutoDiff/compiler_crashers_fixed/sr14290-missing-debug-scopes-in-pullback-trampoline.swift
+
+    patchShebangs .
+
+    ${lib.optionalString (!stdenv.isDarwin) ''
+    # NOTE: This interferes with ABI stability on Darwin, which uses the system
+    # libraries in the hardcoded path /usr/lib/swift.
+    fixCmakeFiles .
+    ''}
+  '';
+
+  configurePhase = ''
+    export SWIFT_SOURCE_ROOT="$PWD"
+    mkdir -p ../build
+    cd ../build
+    export SWIFT_BUILD_ROOT="$PWD"
+
+    # Most builds set a target, but LLDB doesn't. Harmless on non-Darwin.
+    export MACOSX_DEPLOYMENT_TARGET=10.15
+  '';
+
+  # These steps are derived from doing a normal build with.
+  #
+  #   ./swift/utils/build-toolchain test --dry-run
+  #
+  # But dealing with the custom Python build system is far more trouble than
+  # simply invoking CMake directly. Few variables it passes to CMake are
+  # actually required or non-default.
+  #
+  # Using CMake directly also allows us to split up the already large build,
+  # and package Swift components separately.
+  #
+  # Besides `--dry-run`, another good way to compare build changes between
+  # Swift releases is to diff the scripts:
+  #
+  #   git diff swift-5.6.3-RELEASE..swift-5.7-RELEASE -- utils/build*
+  #
+  buildPhase = ''
+    # Helper to build a subdirectory.
+    #
+    # Always reset cmakeFlags before calling this. The cmakeConfigurePhase
+    # amends flags and would otherwise keep expanding it.
+    function buildProject() {
+      mkdir -p $SWIFT_BUILD_ROOT/$1
+      cd $SWIFT_BUILD_ROOT/$1
+
+      cmakeDir=$SWIFT_SOURCE_ROOT/''${2-$1}
+      cmakeConfigurePhase
+
+      ninjaBuildPhase
+    }
+
+    cmakeFlags="-GNinja"
+    buildProject swift-cmark
+
+    # Some notes:
+    # - The Swift build just needs Clang.
+    # - We can further reduce targets to just our targetPlatform.
+    cmakeFlags="
+      -GNinja
+      -DLLVM_ENABLE_PROJECTS=clang
+      -DLLVM_TARGETS_TO_BUILD=${{
+        "x86_64" = "X86";
+        "aarch64" = "AArch64";
+      }.${targetPlatform.parsed.cpu.name}}
+    "
+    buildProject llvm llvm-project/llvm
+
+    '' + lib.optionalString stdenv.isDarwin ''
+    # Add appleSwiftCore to the search paths. We can't simply add it to
+    # buildInputs, because it is potentially an older stdlib than the one we're
+    # building. We have to remove it again after the main Swift build, or later
+    # build steps may fail. (Specific case: Concurrency backdeploy uses the
+    # Sendable protocol, which appears to not be present in the macOS 11 SDK.)
+    OLD_NIX_SWIFTFLAGS_COMPILE="$NIX_SWIFTFLAGS_COMPILE"
+    OLD_NIX_LDFLAGS="$NIX_LDFLAGS"
+    export NIX_SWIFTFLAGS_COMPILE+=" -I ${appleSwiftCore}/lib/swift"
+    export NIX_LDFLAGS+=" -L ${appleSwiftCore}/lib/swift"
+    '' + ''
+
+    # Some notes:
+    # - BOOTSTRAPPING_MODE defaults to OFF in CMake, but is enabled in standard
+    #   builds, so we enable it as well. On Darwin, we have to use the system
+    #   Swift libs because of ABI-stability, but this may be trouble if the
+    #   builder is an older macOS.
+    # - Experimental features are OFF by default in CMake, but some are
+    #   required to build the stdlib.
+    # - SWIFT_STDLIB_ENABLE_OBJC_INTEROP is set explicitely because its check
+    #   is buggy. (Uses SWIFT_HOST_VARIANT_SDK before initialized.)
+    #   Fixed in: https://github.com/apple/swift/commit/84083afef1de5931904d5c815d53856cdb3fb232
+    cmakeFlags="
+      -GNinja
+      -DBOOTSTRAPPING_MODE=BOOTSTRAPPING${lib.optionalString stdenv.isDarwin "-WITH-HOSTLIBS"}
+      -DSWIFT_ENABLE_EXPERIMENTAL_CONCURRENCY=ON
+      -DLLVM_DIR=$SWIFT_BUILD_ROOT/llvm/lib/cmake/llvm
+      -DClang_DIR=$SWIFT_BUILD_ROOT/llvm/lib/cmake/clang
+      -DSWIFT_PATH_TO_CMARK_SOURCE=$SWIFT_SOURCE_ROOT/swift-cmark
+      -DSWIFT_PATH_TO_CMARK_BUILD=$SWIFT_BUILD_ROOT/swift-cmark
+      -DSWIFT_PATH_TO_LIBDISPATCH_SOURCE=$SWIFT_SOURCE_ROOT/swift-corelibs-libdispatch
+      -DEXPERIMENTAL_STRING_PROCESSING_SOURCE_DIR=$SWIFT_SOURCE_ROOT/swift-experimental-string-processing
+      -DSWIFT_INSTALL_COMPONENTS=${lib.concatStringsSep ";" swiftInstallComponents}
+      -DSWIFT_STDLIB_ENABLE_OBJC_INTEROP=${if stdenv.isDarwin then "ON" else "OFF"}
+    "
+    buildProject swift
+
+    '' + lib.optionalString stdenv.isDarwin ''
+    # Restore search paths to remove appleSwiftCore.
+    export NIX_SWIFTFLAGS_COMPILE="$OLD_NIX_SWIFTFLAGS_COMPILE"
+    export NIX_LDFLAGS="$OLD_NIX_LDFLAGS"
+    '' + ''
+
+    # These are based on flags in `utils/build-script-impl`.
+    #
+    # LLDB_USE_SYSTEM_DEBUGSERVER=ON disables the debugserver build on Darwin,
+    # which requires a special signature.
+    #
+    # CMAKE_BUILD_WITH_INSTALL_NAME_DIR ensures we don't use rpath on Darwin.
+    #
+    # NOTE: On Darwin, we only want ncurses in the linker search path, because
+    # headers are part of libsystem. Adding its headers to the search path
+    # causes strange mixing and errors. Note that libedit propagates ncurses,
+    # so we add both manually here, instead of relying on setup hooks.
+    # TODO: Find a better way to prevent this conflict.
+    cmakeFlags="
+      -GNinja
+      -DLLDB_SWIFTC=$SWIFT_BUILD_ROOT/swift/bin/swiftc
+      -DLLDB_SWIFT_LIBS=$SWIFT_BUILD_ROOT/swift/lib/swift
+      -DLLVM_DIR=$SWIFT_BUILD_ROOT/llvm/lib/cmake/llvm
+      -DClang_DIR=$SWIFT_BUILD_ROOT/llvm/lib/cmake/clang
+      -DSwift_DIR=$SWIFT_BUILD_ROOT/swift/lib/cmake/swift
+      -DLLDB_ENABLE_CURSES=ON
+      -DLLDB_ENABLE_LIBEDIT=ON
+      -DLLDB_ENABLE_PYTHON=ON
+      -DLLDB_ENABLE_LZMA=OFF
+      -DLLDB_ENABLE_LUA=OFF
+      -DLLDB_INCLUDE_TESTS=OFF
+      -DCMAKE_BUILD_WITH_INSTALL_NAME_DIR=ON
+      ${lib.optionalString stdenv.isDarwin ''
+      -DLLDB_USE_SYSTEM_DEBUGSERVER=ON
+      ''}
+      -DLibEdit_INCLUDE_DIRS=${libedit.dev}/include
+      -DLibEdit_LIBRARIES=${libedit}/lib/libedit${stdenv.hostPlatform.extensions.sharedLibrary}
+      -DCURSES_INCLUDE_DIRS=${if stdenv.isDarwin then "/var/empty" else ncurses.dev}/include
+      -DCURSES_LIBRARIES=${ncurses}/lib/libncurses${stdenv.hostPlatform.extensions.sharedLibrary}
+      -DPANEL_LIBRARIES=${ncurses}/lib/libpanel${stdenv.hostPlatform.extensions.sharedLibrary}
+    ";
+    buildProject lldb llvm-project/lldb
+
+    ${lib.optionalString stdenv.isDarwin ''
+    # Need to do a standalone build of concurrency for Darwin back deployment.
+    # Based on: utils/swift_build_support/swift_build_support/products/backdeployconcurrency.py
+    cmakeFlags="
+      -GNinja
+      -DCMAKE_Swift_COMPILER=$SWIFT_BUILD_ROOT/swift/bin/swiftc
+
+      -DTOOLCHAIN_DIR=/var/empty
+      -DSWIFT_NATIVE_LLVM_TOOLS_PATH=${stdenv.cc}/bin
+      -DSWIFT_NATIVE_CLANG_TOOLS_PATH=${stdenv.cc}/bin
+      -DSWIFT_NATIVE_SWIFT_TOOLS_PATH=$SWIFT_BUILD_ROOT/swift/bin
+
+      -DCMAKE_CROSSCOMPILING=ON
+
+      -DBUILD_SWIFT_CONCURRENCY_BACK_DEPLOYMENT_LIBRARIES=ON
+      -DSWIFT_INCLUDE_TOOLS=OFF
+      -DSWIFT_BUILD_STDLIB_EXTRA_TOOLCHAIN_CONTENT=OFF
+      -DSWIFT_BUILD_TEST_SUPPORT_MODULES=OFF
+      -DSWIFT_BUILD_STDLIB=OFF
+      -DSWIFT_BUILD_DYNAMIC_STDLIB=OFF
+      -DSWIFT_BUILD_STATIC_STDLIB=OFF
+      -DSWIFT_BUILD_REMOTE_MIRROR=OFF
+      -DSWIFT_BUILD_SDK_OVERLAY=OFF
+      -DSWIFT_BUILD_DYNAMIC_SDK_OVERLAY=OFF
+      -DSWIFT_BUILD_STATIC_SDK_OVERLAY=OFF
+      -DSWIFT_INCLUDE_TESTS=OFF
+      -DSWIFT_BUILD_PERF_TESTSUITE=OFF
+
+      -DSWIFT_HOST_VARIANT_ARCH=${swiftArch}
+      -DBUILD_STANDALONE=ON
+
+      -DSWIFT_INSTALL_COMPONENTS=back-deployment
+
+      -DSWIFT_SDKS=${{
+        "macos" = "OSX";
+        "ios" = "IOS";
+        #IOS_SIMULATOR
+        #TVOS
+        #TVOS_SIMULATOR
+        #WATCHOS
+        #WATCHOS_SIMULATOR
+      }.${targetPlatform.darwinPlatform}}
+
+      -DLLVM_DIR=$SWIFT_BUILD_ROOT/llvm/lib/cmake/llvm
+
+      -DSWIFT_DEST_ROOT=$out
+      -DSWIFT_HOST_VARIANT_SDK=OSX
+
+      -DSWIFT_DARWIN_DEPLOYMENT_VERSION_OSX=10.15
+      -DSWIFT_DARWIN_DEPLOYMENT_VERSION_IOS=13.0
+      -DSWIFT_DARWIN_DEPLOYMENT_VERSION_MACCATALYST=13.0
+      -DSWIFT_DARWIN_DEPLOYMENT_VERSION_TVOS=13.0
+      -DSWIFT_DARWIN_DEPLOYMENT_VERSION_WATCHOS=6.0
+    "
+
+    # This depends on the special Clang build specific to the Swift branch.
+    # We also need to call a specific Ninja target.
+    export CC=$SWIFT_BUILD_ROOT/llvm/bin/clang
+    export CXX=$SWIFT_BUILD_ROOT/llvm/bin/clang++
+    ninjaFlags="back-deployment"
+
+    buildProject swift-concurrency-backdeploy swift
+
+    export CC=$NIX_CC/bin/clang
+    export CXX=$NIX_CC/bin/clang++
+    unset ninjaFlags
+  ''}
+  '';
+
+  # TODO: ~50 failing tests on x86_64-linux. Other platforms not checked.
+  doCheck = false;
+  nativeCheckInputs = [ file ];
+  # TODO: consider using stress-tester and integration-test.
+  checkPhase = ''
+    cd $SWIFT_BUILD_ROOT/swift
+    checkTarget=check-swift-all
+    ninjaCheckPhase
+    unset checkTarget
+  '';
+
+  installPhase = ''
+    # Undo the clang and swift wrapping we did for the build.
+    # (This happened via patches to cmake files.)
+    cd $SWIFT_BUILD_ROOT
+    mv llvm/bin/clang-14{-unwrapped,}
+    mv swift/bin/swift-frontend{-unwrapped,}
+
+    mkdir $out $lib
+
+    # Install clang binaries only. We hide these with the wrapper, so they are
+    # for private use by Swift only.
+    cd $SWIFT_BUILD_ROOT/llvm
+    installTargets=install-clang
+    ninjaInstallPhase
+    unset installTargets
+
+    # LLDB is also a private install.
+    cd $SWIFT_BUILD_ROOT/lldb
+    ninjaInstallPhase
+
+    cd $SWIFT_BUILD_ROOT/swift
+    ninjaInstallPhase
+
+    ${lib.optionalString stdenv.isDarwin ''
+    cd $SWIFT_BUILD_ROOT/swift-concurrency-backdeploy
+    installTargets=install-back-deployment
+    ninjaInstallPhase
+    unset installTargets
+    ''}
+
+    # Separate $lib output here, because specific logic follows.
+    # Only move the dynamic run-time parts, to keep $lib small. Every Swift
+    # build will depend on it.
+    moveToOutput "lib/swift" "$lib"
+    moveToOutput "lib/libswiftDemangle.*" "$lib"
+
+    # This link is here because various tools (swiftpm) check for stdlib
+    # relative to the swift compiler. It's fine if this is for build-time
+    # stuff, but we should patch all cases were it would end up in an output.
+    ln -s $lib/lib/swift $out/lib/swift
+
+    # Swift has a separate resource root from Clang, but locates the Clang
+    # resource root via subdir or symlink. Provide a default here, but we also
+    # patch Swift to prefer NIX_CC if set.
+    ln -s ${clang}/resource-root $lib/lib/swift/clang
+
+    ${lib.optionalString stdenv.isDarwin ''
+    # Install required library for ObjC interop.
+    # TODO: Is there no source code for this available?
+    cp -r ${CLTools_Executables}/usr/lib/arc $out/lib/arc
+    ''}
+  '';
+
+  preFixup = lib.optionalString stdenv.isLinux ''
+    # This is cheesy, but helps the patchelf hook remove /build from RPATH.
+    cd $SWIFT_BUILD_ROOT/..
+    mv build buildx
+  '';
+
+  postFixup = lib.optionalString stdenv.isDarwin ''
+    # These libraries need to use the system install name. The official SDK
+    # does the same (as opposed to using rpath). Presumably, they are part of
+    # the stable ABI. Not using the system libraries at run-time is known to
+    # cause ObjC class conflicts and segfaults.
+    declare -A systemLibs=(
+      [libswiftCore.dylib]=1
+      [libswiftDarwin.dylib]=1
+      [libswiftSwiftOnoneSupport.dylib]=1
+      [libswift_Concurrency.dylib]=1
+    )
+
+    for systemLib in "''${!systemLibs[@]}"; do
+      install_name_tool -id /usr/lib/swift/$systemLib $lib/${swiftLibSubdir}/$systemLib
+    done
+
+    for file in $out/bin/swift-frontend $lib/${swiftLibSubdir}/*.dylib; do
+      changeArgs=""
+      for dylib in $(otool -L $file | awk '{ print $1 }'); do
+        if [[ ''${systemLibs["$(basename $dylib)"]} ]]; then
+          changeArgs+=" -change $dylib /usr/lib/swift/$(basename $dylib)"
+        elif [[ "$dylib" = */bootstrapping1/* ]]; then
+          changeArgs+=" -change $dylib $lib/lib/swift/$(basename $dylib)"
+        fi
+      done
+      if [[ -n "$changeArgs" ]]; then
+        install_name_tool $changeArgs $file
+      fi
+    done
+
+    wrapProgram $out/bin/swift-frontend \
+      --prefix PATH : ${lib.makeBinPath runtimeDeps}
+  '';
+
+  passthru = {
+    inherit
+      swiftOs swiftArch
+      swiftModuleSubdir swiftLibSubdir
+      swiftStaticModuleSubdir swiftStaticLibSubdir;
+
+    # Internal attr for the wrapper.
+    _wrapperParams = wrapperParams;
+  };
+
+  meta = {
+    description = "The Swift Programming Language";
+    homepage = "https://github.com/apple/swift";
+    maintainers = with lib.maintainers; [ dtzWill trepetti dduan trundle stephank ];
+    license = lib.licenses.asl20;
+    platforms = with lib.platforms; linux ++ darwin;
+    # Swift doesn't support 32-bit Linux, unknown on other platforms.
+    badPlatforms = lib.platforms.i686;
+    timeout = 86400; # 24 hours.
+  };
+}
--- a/pkgs/development/compilers/swift/compiler/patches/clang-toolchain-dir.patch
+++ b/pkgs/development/compilers/swift/compiler/patches/clang-toolchain-dir.patch
--- a/pkgs/development/compilers/swift/compiler/patches/clang-wrap.patch
+++ b/pkgs/development/compilers/swift/compiler/patches/clang-wrap.patch
@ -0,0 +1,18 @@
+Wrap the clang produced during the build
+
+--- a/tools/driver/CMakeLists.txt
+++ b/tools/driver/CMakeLists.txt
+@@ -59,6 +59,13 @@ endif()
+ 
+ add_dependencies(clang clang-resource-headers)
+ 
+# Nix: wrap the clang build.
+add_custom_command(
+  TARGET clang POST_BUILD
+  COMMAND nix-swift-make-clang-wrapper $<TARGET_FILE:clang>
+  VERBATIM
+)
+
+ if(NOT CLANG_LINKS_TO_CREATE)
+   set(CLANG_LINKS_TO_CREATE clang++ clang-cl clang-cpp)
+ endif()
--- a/pkgs/development/compilers/swift/compiler/patches/llvm-module-cache.patch
+++ b/pkgs/development/compilers/swift/compiler/patches/llvm-module-cache.patch
@ -0,0 +1,30 @@
+The compiler fails if LLVM modules are enabled and it cannot write its module
+cache. This patch detects and rejects the fake, non-existant $HOME used in Nix
+builds.
+
+We could simply return false in `cache_directory`, but that completely disables
+module caching, and may unnecessarily slow down builds. Instead, let it use
+'/tmp/.cache'.
+
+--- a/lib/Support/Unix/Path.inc
+++ b/lib/Support/Unix/Path.inc
+@@ -1380,6 +1380,9 @@ bool user_config_directory(SmallVectorImpl<char> &result) {
+   if (!home_directory(result)) {
+     return false;
+   }
+  if (std::equal(result.begin(), result.end(), "/homeless-shelter")) {
+    return false;
+  }
+   append(result, ".config");
+   return true;
+ }
+@@ -1401,6 +1404,9 @@ bool cache_directory(SmallVectorImpl<char> &result) {
+   if (!home_directory(result)) {
+     return false;
+   }
+  if (std::equal(result.begin(), result.end(), "/homeless-shelter")) {
+    system_temp_directory(true/*ErasedOnReboot*/, result);
+  }
+   append(result, ".cache");
+   return true;
+ }
--- a/pkgs/development/compilers/swift/compiler/patches/swift-darwin-plistbuddy-workaround.patch
+++ b/pkgs/development/compilers/swift/compiler/patches/swift-darwin-plistbuddy-workaround.patch
@ -0,0 +1,17 @@
+CMake tries to read a list field from SDKSettings.plist, but the output of
+facebook/xcbuild PlistBuddy is incompatible with Apple's.
+
+Simply set the supported architectures to the one target architecture we're
+building for.
+
+--- a/cmake/modules/SwiftConfigureSDK.cmake
+++ b/cmake/modules/SwiftConfigureSDK.cmake
+@@ -189,7 +189,7 @@ macro(configure_sdk_darwin
+   endif()
+ 
+   # Remove any architectures not supported by the SDK.
+-  remove_sdk_unsupported_archs(${name} ${xcrun_name} ${SWIFT_SDK_${prefix}_PATH} SWIFT_SDK_${prefix}_ARCHITECTURES)
+  set(SWIFT_SDK_${prefix}_ARCHITECTURES "@swiftArch@")
+ 
+   list_intersect(
+     "${SWIFT_DARWIN_MODULE_ARCHS}"            # lhs
--- a/pkgs/development/compilers/swift/compiler/patches/swift-linux-fix-linking.patch
+++ b/pkgs/development/compilers/swift/compiler/patches/swift-linux-fix-linking.patch
@ -0,0 +1,21 @@
+--- a/lib/Driver/ToolChains.cpp
+++ b/lib/Driver/ToolChains.cpp
+@@ -1475,7 +1475,17 @@ const char *ToolChain::getClangLinkerDriver(
+ 
+     // If there is a linker driver in the toolchain folder, use that instead.
+     if (auto tool = llvm::sys::findProgramByName(LinkerDriver, {toolchainPath}))
+-      LinkerDriver = Args.MakeArgString(tool.get());
+      return Args.MakeArgString(tool.get());
+  }
+
+  // For Nix, prefer linking using the wrapped system clang, instead of using
+  // the unwrapped clang packaged with swift. The latter is unable to link, but
+  // we still want to use it for other purposes (clang importer).
+  if (auto nixCC = llvm::sys::Process::GetEnv("NIX_CC")) {
+    llvm::SmallString<128> binDir(nixCC.getValue());
+    llvm::sys::path::append(binDir, "bin");
+    if (auto tool = llvm::sys::findProgramByName(LinkerDriver, {binDir.str()}))
+      return Args.MakeArgString(tool.get());
+   }
+ 
+   return LinkerDriver;
--- a/pkgs/development/compilers/swift/compiler/patches/swift-nix-resource-root.patch
+++ b/pkgs/development/compilers/swift/compiler/patches/swift-nix-resource-root.patch
@ -0,0 +1,67 @@
+Swift normally looks for the Clang resource dir in a subdir/symlink of its own
+resource dir. We provide a symlink to the Swift build-time Clang as a default
+there, but we also here patch two checks to try locate it via NIX_CC.
+
+The first (ClangImporter.cpp) happens when Swift code imports C modules. The
+second (ToolChains.cpp) happens when Swift is used to link the final product.
+
+--- a/lib/ClangImporter/ClangImporter.cpp
+++ b/lib/ClangImporter/ClangImporter.cpp
+@@ -68,6 +68,7 @@
+ #include "llvm/Support/FileSystem.h"
+ #include "llvm/Support/Memory.h"
+ #include "llvm/Support/Path.h"
+#include "llvm/Support/Process.h"
+ #include "llvm/Support/YAMLParser.h"
+ #include "llvm/Support/YAMLTraits.h"
+ #include <algorithm>
+@@ -809,6 +810,17 @@ importer::addCommonInvocationArguments(
+ 
+   const std::string &overrideResourceDir = importerOpts.OverrideResourceDir;
+   if (overrideResourceDir.empty()) {
+    // Prefer the Clang resource directory from NIX_CC, to allow swapping in a
+    // different stdenv.
+    // TODO: Figure out how to provide a user override for this. Probably a
+    // niche use case, though, and for now a user can unset NIX_CC to work
+    // around it if necessary.
+    if (auto nixCC = llvm::sys::Process::GetEnv("NIX_CC")) {
+      llvm::SmallString<128> resourceDir(nixCC.getValue());
+      llvm::sys::path::append(resourceDir, "resource-root");
+      invocationArgStrs.push_back("-resource-dir");
+      invocationArgStrs.push_back(std::string(resourceDir.str()));
+    } else {
+     llvm::SmallString<128> resourceDir(searchPathOpts.RuntimeResourcePath);
+ 
+     // Adjust the path to refer to our copy of the Clang resource directory
+@@ -824,6 +836,7 @@ importer::addCommonInvocationArguments(
+     // Set the Clang resource directory to the path we computed.
+     invocationArgStrs.push_back("-resource-dir");
+     invocationArgStrs.push_back(std::string(resourceDir.str()));
+    } // nixCC
+   } else {
+     invocationArgStrs.push_back("-resource-dir");
+     invocationArgStrs.push_back(overrideResourceDir);
+--- a/lib/Driver/ToolChains.cpp
+++ b/lib/Driver/ToolChains.cpp
+@@ -1372,10 +1372,20 @@ void ToolChain::getClangLibraryPath(const ArgList &Args,
+                                     SmallString<128> &LibPath) const {
+   const llvm::Triple &T = getTriple();
+ 
+  // Nix: We provide a `clang` symlink in the default Swift resource root, but
+  // prefer detecting the Clang resource root via NIX_CC, to allow swapping in
+  // a different stdenv. However, always honor a user-provided `-resource-dir`.
+  auto nixCC = llvm::sys::Process::GetEnv("NIX_CC");
+  if (nixCC && !Args.hasArgNoClaim(options::OPT_resource_dir)) {
+    LibPath.assign(nixCC.getValue());
+    llvm::sys::path::append(LibPath, "resource-root");
+  } else {
+   getResourceDirPath(LibPath, Args, /*Shared=*/true);
+   // Remove platform name.
+   llvm::sys::path::remove_filename(LibPath);
+-  llvm::sys::path::append(LibPath, "clang", "lib",
+  llvm::sys::path::append(LibPath, "clang");
+  } // nixCC
+  llvm::sys::path::append(LibPath, "lib",
+                           T.isOSDarwin() ? "darwin"
+                                          : getPlatformNameForTriple(T));
+ }
--- a/pkgs/development/compilers/swift/compiler/patches/swift-prevent-sdk-dirs-warning.patch
+++ b/pkgs/development/compilers/swift/compiler/patches/swift-prevent-sdk-dirs-warning.patch
@ -0,0 +1,39 @@
+Prevents a user-visible warning on every compilation:
+
+  ld: warning: directory not found for option '-L.../MacOSX11.0.sdk/usr/lib/swift'
+
+--- a/lib/Driver/ToolChains.cpp
+++ b/lib/Driver/ToolChains.cpp
+@@ -1455,9 +1455,11 @@ void ToolChain::getRuntimeLibraryPaths(SmallVectorImpl<std::string> &runtimeLibP
+       runtimeLibPaths.push_back(std::string(scratchPath.str()));
+     }
+ 
+    if (!SDKPath.startswith("@storeDir@")) {
+     scratchPath = SDKPath;
+     llvm::sys::path::append(scratchPath, "usr", "lib", "swift");
+     runtimeLibPaths.push_back(std::string(scratchPath.str()));
+    }
+   }
+ }
+ 
+--- a/lib/Frontend/CompilerInvocation.cpp
+++ b/lib/Frontend/CompilerInvocation.cpp
+@@ -185,7 +185,9 @@ static void updateRuntimeLibraryPaths(SearchPathOptions &SearchPathOpts,
+       RuntimeLibraryImportPaths.push_back(std::string(LibPath.str()));
+     }
+ 
+-    LibPath = SearchPathOpts.getSDKPath();
+    auto SDKPath = SearchPathOpts.getSDKPath();
+    if (!SDKPath.startswith("@storeDir@")) {
+    LibPath = SDKPath;
+     llvm::sys::path::append(LibPath, "usr", "lib", "swift");
+     if (!Triple.isOSDarwin()) {
+       // Use the non-architecture suffixed form with directory-layout
+@@ -200,6 +202,7 @@ static void updateRuntimeLibraryPaths(SearchPathOptions &SearchPathOpts,
+       llvm::sys::path::append(LibPath, swift::getMajorArchitectureName(Triple));
+     }
+     RuntimeLibraryImportPaths.push_back(std::string(LibPath.str()));
+    }
+   }
+   SearchPathOpts.setRuntimeLibraryImportPaths(RuntimeLibraryImportPaths);
+ }
--- a/pkgs/development/compilers/swift/compiler/patches/swift-separate-lib.patch
+++ b/pkgs/development/compilers/swift/compiler/patches/swift-separate-lib.patch
@ -0,0 +1,26 @@
+Patch paths to use the separate 'lib' output. One of the things this patch
+fixes is the output of `swift -frontend -print-target-info`, which swiftpm uses
+to set rpath on Linux.
+
+The check if the executable path starts with 'out' is necessary for
+bootstrapping, or the compiler will fail when run from the build directory.
+
+--- a/lib/Frontend/CompilerInvocation.cpp
+++ b/lib/Frontend/CompilerInvocation.cpp
+@@ -49,11 +49,16 @@ swift::CompilerInvocation::CompilerInvocation() {
+ void CompilerInvocation::computeRuntimeResourcePathFromExecutablePath(
+     StringRef mainExecutablePath, bool shared,
+     llvm::SmallVectorImpl<char> &runtimeResourcePath) {
+  if (mainExecutablePath.startswith("@storeDir@")) {
+    auto libPath = StringRef("@lib@");
+    runtimeResourcePath.append(libPath.begin(), libPath.end());
+  } else {
+   runtimeResourcePath.append(mainExecutablePath.begin(),
+                              mainExecutablePath.end());
+ 
+   llvm::sys::path::remove_filename(runtimeResourcePath); // Remove /swift
+   llvm::sys::path::remove_filename(runtimeResourcePath); // Remove /bin
+  }
+   appendSwiftLibDir(runtimeResourcePath, shared);
+ }
+ 
--- a/pkgs/development/compilers/swift/compiler/patches/swift-wrap.patch
+++ b/pkgs/development/compilers/swift/compiler/patches/swift-wrap.patch
@ -0,0 +1,46 @@
+Wrap the swift compiler produced during the build
+
+--- a/tools/driver/CMakeLists.txt
+++ b/tools/driver/CMakeLists.txt
+@@ -16,6 +16,13 @@ if(${LIBSWIFT_BUILD_MODE} MATCHES "BOOTSTRAPPING.*")
+                           swiftDriverTool
+                           libswiftStub)
+ 
+  # Nix: wrap the swift build.
+  add_custom_command(
+    TARGET swift-frontend-bootstrapping0 POST_BUILD
+    COMMAND nix-swift-make-swift-wrapper $<TARGET_FILE:swift-frontend-bootstrapping0>
+    VERBATIM
+  )
+
+   swift_create_post_build_symlink(swift-frontend-bootstrapping0
+     SOURCE "swift-frontend${CMAKE_EXECUTABLE_SUFFIX}"
+     DESTINATION "swiftc${CMAKE_EXECUTABLE_SUFFIX}"
+@@ -34,6 +41,13 @@ if(${LIBSWIFT_BUILD_MODE} MATCHES "BOOTSTRAPPING.*")
+                           swiftDriverTool
+                           libswift-bootstrapping1)
+ 
+  # Nix: wrap the swift build.
+  add_custom_command(
+    TARGET swift-frontend-bootstrapping1 POST_BUILD
+    COMMAND nix-swift-make-swift-wrapper $<TARGET_FILE:swift-frontend-bootstrapping1>
+    VERBATIM
+  )
+
+   swift_create_post_build_symlink(swift-frontend-bootstrapping1
+     SOURCE "swift-frontend${CMAKE_EXECUTABLE_SUFFIX}"
+     DESTINATION "swiftc${CMAKE_EXECUTABLE_SUFFIX}"
+@@ -50,6 +64,13 @@ target_link_libraries(swift-frontend
+                         swiftDriverTool
+                         libswift)
+ 
+# Nix: wrap the swift build.
+add_custom_command(
+  TARGET swift-frontend POST_BUILD
+  COMMAND nix-swift-make-swift-wrapper $<TARGET_FILE:swift-frontend>
+  VERBATIM
+)
+
+ # Create a `swift-driver` executable adjacent to the `swift-frontend` executable
+ # to ensure that `swiftc` forwards to the standalone driver when invoked.
+ swift_create_early_driver_copies(swift-frontend)
--- a/pkgs/development/compilers/swift/default.nix
+++ b/pkgs/development/compilers/swift/default.nix
@ -1,475 +1,101 @@
-{ lib, stdenv
-, cmake
-, coreutils
-, glibc
-, gccForLibs
-, which
-, perl
-, libedit
-, ninja
-, pkg-config
-, sqlite
-, libxml2
-, clang_13
-, python3
-, ncurses
-, libuuid
-, libxcrypt
-, icu
-, libgcc
-, libblocksruntime
-, curl
-, rsync
-, git
-, libgit2
-, fetchFromGitHub
-, makeWrapper
-, gnumake
-, file
+{ lib
+, pkgs
+, newScope
+, darwin
+, llvmPackages_latest
+, overrideCC
 }:

 let
-  # The Swift toolchain script builds projects with separate repos. By convention, some of them share
-  # the same version with the main Swift compiler project per release. We fetch these with
-  # `fetchSwiftRelease`. The rest have their own versions locked to each Swift release, as defined in the
-  # Swift compiler repo:
-  #   utils/update_checkout/update_checkout-config.json.
-  #
-  # ... among projects listed in that file, we provide our own:
-  # - CMake
-  # - ninja
-  # - icu
-  #
-  # ... we'd like to include the following in the future:
-  # - stress-tester
-  # - integration-tests
+  self = rec {
+
+    callPackage = newScope self;
+
+    # Current versions of Swift on Darwin require macOS SDK 10.15 at least.
+    # Re-export this so we can rely on the minimum Swift SDK elsewhere.
+    apple_sdk = pkgs.darwin.apple_sdk_11_0;
+
+    # Our current Clang on Darwin is v11, but we need at least v12. The
+    # following applies the newer Clang with the same libc overrides as
+    # `apple_sdk.stdenv`.
+    #
+    # If 'latest' becomes an issue, recommend replacing it with v14, which is
+    # currently closest to the official Swift builds.
+    clang = if pkgs.stdenv.isDarwin
+      then
+        llvmPackages_latest.clang.override rec {
+          libc = apple_sdk.Libsystem;
+          bintools = pkgs.bintools.override { inherit libc; };
+        }
+      else
+        llvmPackages_latest.clang;
+
+    # Overrides that create a useful environment for swift packages, allowing
+    # packaging with `swiftPackages.callPackage`. These are similar to
+    # `apple_sdk_11_0.callPackage`, with our clang on top.
+    inherit (clang) bintools;
+    stdenv = overrideCC pkgs.stdenv clang;
+    darwin = pkgs.darwin.overrideScope (_: prev: {
+      inherit apple_sdk;
+      inherit (apple_sdk) Libsystem LibsystemCross libcharset libunwind objc4 configd IOKit Security;
+      CF = apple_sdk.CoreFoundation;
+    });
+    xcodebuild = pkgs.xcbuild.override {
+      inherit (apple_sdk.frameworks) CoreServices CoreGraphics ImageIO;
+      inherit stdenv;
+      sdkVer = "10.15";
+    };
+    xcbuild = xcodebuild;
+
+    swift-unwrapped = callPackage ./compiler {
+      inherit (darwin) DarwinTools cctools sigtool;
+      inherit (apple_sdk) MacOSX-SDK CLTools_Executables;
+      inherit (apple_sdk.frameworks) CoreServices Foundation Combine;
+    };
+
+    swiftNoSwiftDriver = callPackage ./wrapper {
+      swift = swift-unwrapped;
+      useSwiftDriver = false;
+    };
+
+    Dispatch = if stdenv.isDarwin
+      then null # part of libsystem
+      else callPackage ./libdispatch { swift = swiftNoSwiftDriver; };
+
+    Foundation = if stdenv.isDarwin
+      then apple_sdk.frameworks.Foundation
+      else callPackage ./foundation { swift = swiftNoSwiftDriver; };
+
+    # TODO: Apple distributes a binary XCTest with Xcode, but it is not part of
+    # CLTools (or SUS), so would have to figure out how to fetch it. The binary
+    # version has several extra features, like a test runner and ObjC support.
+    XCTest = callPackage ./xctest {
+      inherit (darwin) DarwinTools;
+      swift = swiftNoSwiftDriver;
+    };
+
+    swiftpm = callPackage ./swiftpm {
+      inherit (darwin) DarwinTools cctools;
+      inherit (apple_sdk.frameworks) CryptoKit LocalAuthentication;
+      swift = swiftNoSwiftDriver;
+    };
+
+    swift-driver = callPackage ./swift-driver {
+      swift = swiftNoSwiftDriver;
+    };
+
+    swift = callPackage ./wrapper {
+      swift = swift-unwrapped;
+    };
+
+    sourcekit-lsp = callPackage ./sourcekit-lsp {
+      inherit (apple_sdk.frameworks) CryptoKit LocalAuthentication;
+    };
+
+    swift-docc = callPackage ./swift-docc {
+      inherit (apple_sdk.frameworks) CryptoKit LocalAuthentication;
+    };

-  versions = {
-    swift = "5.6.2";
-    yams = "4.0.2";
-    argumentParser = "1.0.3";
-    format = "release/5.6";
-    crypto = "1.1.5";
-    nio = "2.31.2";
-    nio-ssl = "2.15.0";
  };

-  fetchAppleRepo = { repo, rev, sha256 }:
-    fetchFromGitHub {
-      owner = "apple";
-      inherit repo rev sha256;
-      name = "${repo}-${rev}-src";
-    };
-
-  fetchSwiftRelease = { repo, sha256, fetchSubmodules ? false }:
-    fetchFromGitHub {
-      owner = "apple";
-      inherit repo sha256 fetchSubmodules;
-      rev = "swift-${versions.swift}-RELEASE";
-      name = "${repo}-${versions.swift}-src";
-    };
-
-  sources = {
-    # Projects that share `versions.swift` for each release.
-
-    swift = fetchSwiftRelease {
-      repo = "swift";
-      sha256 = "sha256-wiRXAXWEksJuy+YQQ+B7tzr2iLkSVkgV6o+wIz7yKJA=";
-    };
-    cmark = fetchSwiftRelease {
-      repo = "swift-cmark";
-      sha256 = "sha256-f0BoTs4HYdx/aJ9HIGCWMalhl8PvClWD6R4QK3qSgAw=";
-    };
-    llbuild = fetchSwiftRelease {
-      repo = "swift-llbuild";
-      sha256 = "sha256-SQ6V0zVshIYMjayx+ZpYuLijgQ89tqRnPlXBPf2FYqM=";
-    };
-    driver = fetchSwiftRelease {
-      repo = "swift-driver";
-      sha256 = "sha256-D5/C4Rbv5KIsKpy6YbuMxGIGaQkn80PD4Cp0l6bPKzY=";
-    };
-    toolsSupportCore = fetchSwiftRelease {
-      repo = "swift-tools-support-core";
-      sha256 = "sha256-FbtQCq1sSlzrskCrgzD4iYuo5eGaXrAUUxoNX/BiOfg=";
-    };
-    swiftpm = fetchSwiftRelease {
-      repo = "swift-package-manager";
-      sha256 = "sha256-esO4Swz3UYngbVgxoV+fkhSC0AU3IaxVjWkgK/s3x68=";
-    };
-    syntax = fetchSwiftRelease {
-      repo = "swift-syntax";
-      sha256 = "sha256-C9FPCtq49BvKXtTWWeReYWNrU70pHzT2DhAv3NiTbPU=";
-    };
-    corelibsXctest = fetchSwiftRelease {
-      repo = "swift-corelibs-xctest";
-      sha256 = "sha256-0hizfnKJaUUA+jXuXzXWk72FmlSyc+UGEf7BTLdJrx4=";
-    };
-    corelibsFoundation = fetchSwiftRelease {
-      repo = "swift-corelibs-foundation";
-      sha256 = "sha256-8sCL8Ia6yb6bRsJZ52gUJH0jN3lwClM573G8jgUdEhw=";
-    };
-    corelibsLibdispatch = fetchSwiftRelease {
-      repo = "swift-corelibs-libdispatch";
-      sha256 = "sha256-1tIskUMnfblnvZaFDQPUMBfWTmBYG98s7rEww7PwZO8=";
-      fetchSubmodules = true;
-    };
-    indexstoreDb = fetchSwiftRelease {
-      repo = "indexstore-db";
-      sha256 = "sha256-/PO4eMiASZN3pjFjBQ1r8vYwGRn6xm3SWaB2HDZlkPs=";
-    };
-    sourcekitLsp = fetchSwiftRelease {
-      repo = "sourcekit-lsp";
-      sha256 = "sha256-ttgUC4ZHD3P/xLHllEbACtHVrJ6HXqeVWccXcoPMkts=";
-    };
-    llvmProject = fetchSwiftRelease {
-      repo = "llvm-project";
-      sha256 = "sha256-YVs3lKV2RlaovpYkdGO+vzypolrmXmbKBBP4+osNMYw=";
-    };
-    docc = fetchSwiftRelease {
-      repo = "swift-docc";
-      sha256 = "sha256-rWiaNamZoHTO1bKpubxuT7m1IBOl7amT5M71mNauilY=";
-    };
-    docc-render-artifact = fetchSwiftRelease {
-      repo = "swift-docc-render-artifact";
-      sha256 = "sha256-AX+rtDLhq8drk7N6/hoH3fQioudmmTCnEhR45bME8uU=";
-    };
-    docc-symbolkit = fetchSwiftRelease {
-      repo = "swift-docc-symbolkit";
-      sha256 = "sha256-Xy1TQ5ucDW+MnkeOvVznsATBmwcQ3p1x+ofQ22ofk+o=";
-    };
-    lmdb = fetchSwiftRelease {
-      repo = "swift-lmdb";
-      sha256 = "sha256-i2GkWRWq1W5j8rF4PiHwWgT4Dur5FCY2o44HvUU3vtQ=";
-    };
-    markdown = fetchSwiftRelease {
-      repo = "swift-markdown";
-      sha256 = "sha256-XtFSBiNHhmULjS4OqSpMgUetLu3peRg7l6HpjwVsTj8=";
-    };
-
-    cmark-gfm = fetchAppleRepo {
-      repo = "swift-cmark";
-      rev = "swift-${versions.swift}-RELEASE-gfm";
-      sha256 = "sha256-g28iKmMR2W0r1urf8Fk1HBxAp5OlonNYSVN3Ril66tQ=";
-    };
-
-    # Projects that have their own versions during each release
-
-    argumentParser = fetchAppleRepo {
-      repo = "swift-argument-parser";
-      rev = "${versions.argumentParser}";
-      sha256 = "sha256-vNqkuAwSZNCWvwe6E5BqbXQdIbmIia0dENmmSQ9P8Mo=";
-    };
-    format = fetchAppleRepo {
-      repo = "swift-format";
-      rev = "${versions.format}";
-      sha256 = "sha256-1f5sIrv9IbPB7Vnahq1VwH8gT41dcjWldRwvVEaMdto=";
-    };
-    crypto = fetchAppleRepo {
-      repo = "swift-crypto";
-      rev = "${versions.crypto}";
-      sha256 = "sha256-jwxXQuOF+CnpLMwTZ2z52Fgx2b97yWzXiPTx0Ye8KCQ=";
-    };
-    nio = fetchAppleRepo {
-      repo = "swift-nio";
-      rev = versions.nio;
-      sha256 = "sha256-FscOA/S7on31QCR/MZFjg4ZB3FGJ+rdptZ6MRZJXexE=";
-    };
-    nio-ssl = fetchAppleRepo {
-      repo = "swift-nio-ssl";
-      rev = versions.nio-ssl;
-      sha256 = "sha256-5QGkmkCOXhG3uOdf0bd3Fo1MFekB8/WcveBXGhtVZKo=";
-    };
-    yams = fetchFromGitHub {
-      owner = "jpsim";
-      repo = "Yams";
-      rev = versions.yams;
-      sha256 = "sha256-cTkCAwxxLc35laOon1ZXXV8eAxX02oDolJyPauhZado=";
-      name = "Yams-${versions.yams}-src";
-    };
-  };
-
-  devInputs = [
-    curl
-    glibc
-    icu
-    libblocksruntime
-    libedit
-    libgcc
-    libuuid
-    libxcrypt
-    libxml2
-    ncurses
-    sqlite
-  ];
-
-  python = (python3.withPackages (ps: [ps.six]));
-
-  cmakeFlags = [
-    "-DGLIBC_INCLUDE_PATH=${stdenv.cc.libc.dev}/include"
-    "-DC_INCLUDE_DIRS=${lib.makeSearchPathOutput "dev" "include" devInputs}:${libxml2.dev}/include/libxml2"
-    "-DGCC_INSTALL_PREFIX=${gccForLibs}"
-  ];
-
-in
-stdenv.mkDerivation {
-  pname = "swift";
-  version = versions.swift;
-
-  nativeBuildInputs = [
-    cmake
-    git
-    makeWrapper
-    ninja
-    perl
-    pkg-config
-    python
-    rsync
-    which
-  ];
-  buildInputs = devInputs ++ [
-    clang_13
-  ];
-
-  # TODO: Revisit what needs to be propagated and how.
-  propagatedBuildInputs = [
-    libgcc
-    libgit2
-    python
-  ];
-  propagatedUserEnvPkgs = [ git pkg-config ];
-
-  hardeningDisable = [ "format" ]; # for LLDB
-
-  unpackPhase = ''
-    mkdir src
-    cd src
-    export SWIFT_SOURCE_ROOT=$PWD
-
-    cp -r ${sources.swift} swift
-    cp -r ${sources.cmark} cmark
-    cp -r ${sources.llbuild} llbuild
-    cp -r ${sources.argumentParser} swift-argument-parser
-    cp -r ${sources.driver} swift-driver
-    cp -r ${sources.toolsSupportCore} swift-tools-support-core
-    cp -r ${sources.swiftpm} swiftpm
-    cp -r ${sources.syntax} swift-syntax
-    cp -r ${sources.corelibsXctest} swift-corelibs-xctest
-    cp -r ${sources.corelibsFoundation} swift-corelibs-foundation
-    cp -r ${sources.corelibsLibdispatch} swift-corelibs-libdispatch
-    cp -r ${sources.yams} yams
-    cp -r ${sources.indexstoreDb} indexstore-db
-    cp -r ${sources.sourcekitLsp} sourcekit-lsp
-    cp -r ${sources.format} swift-format
-    cp -r ${sources.crypto} swift-crypto
-    cp -r ${sources.llvmProject} llvm-project
-    cp -r ${sources.cmark-gfm} swift-cmark-gfm
-    cp -r ${sources.docc} swift-docc
-    cp -r ${sources.docc-render-artifact} swift-docc-render-artifact
-    cp -r ${sources.docc-symbolkit} swift-docc-symbolkit
-    cp -r ${sources.lmdb} swift-lmdb
-    cp -r ${sources.markdown} swift-markdown
-    cp -r ${sources.nio} swift-nio
-    cp -r ${sources.nio-ssl} swift-nio-ssl
-
-    chmod -R u+w .
-  '';
-
-  patchPhase = ''
-    # Just patch all the things for now, we can focus this later.
-    patchShebangs $SWIFT_SOURCE_ROOT
-
-    # TODO: eliminate use of env.
-    find -type f -print0 | xargs -0 sed -i \
-      -e 's|/usr/bin/env|${coreutils}/bin/env|g' \
-      -e 's|/usr/bin/make|${gnumake}/bin/make|g' \
-      -e 's|/bin/mkdir|${coreutils}/bin/mkdir|g' \
-      -e 's|/bin/cp|${coreutils}/bin/cp|g' \
-      -e 's|/usr/bin/file|${file}/bin/file|g'
-
-    # Build configuration patches.
-    patch -p1 -d swift -i ${./patches/0001-build-presets-linux-don-t-require-using-Ninja.patch}
-    patch -p1 -d swift -i ${./patches/0002-build-presets-linux-allow-custom-install-prefix.patch}
-    patch -p1 -d swift -i ${./patches/0003-build-presets-linux-don-t-build-extra-libs.patch}
-    patch -p1 -d swift -i ${./patches/0004-build-presets-linux-plumb-extra-cmake-options.patch}
-    patch -p1 -d swift -i ${./patches/0007-build-presets-linux-os-stdlib.patch}
-    substituteInPlace swift/cmake/modules/SwiftConfigureSDK.cmake \
-      --replace '/usr/include' "${stdenv.cc.libc.dev}/include"
-    sed -i swift/utils/build-presets.ini \
-      -e 's/^test-installable-package$/# \0/' \
-      -e 's/^test$/# \0/' \
-      -e 's/^validation-test$/# \0/' \
-      -e 's/^long-test$/# \0/' \
-      -e 's/^stress-test$/# \0/' \
-      -e 's/^test-optimized$/# \0/' \
-      -e 's/^swift-install-components=autolink.*$/\0;editor-integration/'
-
-    # LLVM toolchain patches.
-    patch -p1 -d llvm-project/clang -i ${./patches/0005-clang-toolchain-dir.patch}
-    patch -p1 -d llvm-project/clang -i ${./patches/0006-clang-purity.patch}
-    substituteInPlace llvm-project/clang/lib/Driver/ToolChains/Linux.cpp \
-      --replace 'SysRoot + "/lib' '"${glibc}/lib" "' \
-      --replace 'SysRoot + "/usr/lib' '"${glibc}/lib" "' \
-      --replace 'LibDir = "lib";' 'LibDir = "${glibc}/lib";' \
-      --replace 'LibDir = "lib64";' 'LibDir = "${glibc}/lib";' \
-      --replace 'LibDir = X32 ? "libx32" : "lib64";' 'LibDir = "${glibc}/lib";'
-
-    # Substitute ncurses for curses in llbuild.
-    sed -i 's/curses/ncurses/' llbuild/*/*/CMakeLists.txt
-    sed -i 's/curses/ncurses/' llbuild/*/*/*/CMakeLists.txt
-
-    # uuid.h is not part of glibc, but of libuuid.
-    sed -i 's|''${GLIBC_INCLUDE_PATH}/uuid/uuid.h|${libuuid.dev}/include/uuid/uuid.h|' swift/stdlib/public/Platform/glibc.modulemap.gyb
-
-    # Support library build script patches.
-    PREFIX=''${out/#\/}
-    substituteInPlace swift/utils/swift_build_support/swift_build_support/products/benchmarks.py \
-      --replace \
-      "'--toolchain', toolchain_path," \
-      "'--toolchain', '/build/install/$PREFIX',"
-    substituteInPlace swift/benchmark/scripts/build_script_helper.py \
-      --replace \
-      "swiftbuild_path = os.path.join(args.toolchain, \"usr\", \"bin\", \"swift-build\")" \
-      "swiftbuild_path = os.path.join(args.toolchain, \"bin\", \"swift-build\")"
-    substituteInPlace swift-corelibs-xctest/build_script.py \
-      --replace usr "$PREFIX"
-
-    # Can be removed in later swift-docc versions, see
-    # https://github.com/apple/swift-docc/commit/bff70b847008f91ac729cfd299a85481eef3f581
-    substituteInPlace swift-docc/build-script-helper.py \
-      --replace \
-      "subprocess.check_output(cmd, env=env).strip(), 'docc')" \
-      "subprocess.check_output(cmd, env=env).strip().decode(), 'docc')"
-
-    # Can be removed in later Swift versions, see
-    # https://github.com/apple/swift/pull/58755
-    substituteInPlace swift/utils/process-stats-dir.py \
-      --replace \
-      "type=argparse.FileType('wb', 0)," \
-      "type=argparse.FileType('w', 0),"
-
-    # Apply Python 3 fix, see
-    # https://github.com/apple/swift/commit/ec6bc595092974628b27b114a472e84162261bbd
-    substituteInPlace swift/utils/swift_build_support/swift_build_support/productpipeline_list_builder.py \
-      --replace \
-      "filter(lambda x: x is not None, pipeline)" \
-      "[p for p in pipeline if p is not None]"
-  '';
-
-  configurePhase = ''
-    cd ..
-
-    mkdir build install
-    export SWIFT_BUILD_ROOT=$PWD/build
-    export SWIFT_INSTALL_DIR=$PWD/install
-
-    export INSTALLABLE_PACKAGE=$PWD/swift.tar.gz
-    export NIX_ENFORCE_PURITY=
-
-    cd $SWIFT_BUILD_ROOT
-  '';
-
-  buildPhase = ''
-    # Explicitly include C++ headers to prevent errors where stdlib.h is not found from cstdlib.
-    export NIX_CFLAGS_COMPILE="$(< ${clang_13}/nix-support/libcxx-cxxflags) $NIX_CFLAGS_COMPILE"
-
-    # During the Swift build, a full local LLVM build is performed and the resulting clang is
-    # invoked. This compiler is not using the Nix wrappers, so it needs some help to find things.
-    export NIX_LDFLAGS_BEFORE="-rpath ${gccForLibs.lib}/lib -L${gccForLibs.lib}/lib $NIX_LDFLAGS_BEFORE"
-
-    # However, we want to use the wrapped compiler whenever possible.
-    export CC="${clang_13}/bin/clang"
-
-    $SWIFT_SOURCE_ROOT/swift/utils/build-script \
-      --preset=buildbot_linux \
-      installable_package=$INSTALLABLE_PACKAGE \
-      install_prefix=$out \
-      install_destdir=$SWIFT_INSTALL_DIR \
-      extra_cmake_options="${lib.concatStringsSep "," cmakeFlags}"
-  '';
-
-  doCheck = true;
-
-  nativeCheckInputs = [ file ];
-
-  checkPhase = ''
-    # Remove compiler build system tests which fail due to our modified default build profile and
-    # nixpkgs-provided version of CMake.
-    rm $SWIFT_SOURCE_ROOT/swift/validation-test/BuildSystem/infer_implies_install_all.test
-    rm $SWIFT_SOURCE_ROOT/swift/validation-test/BuildSystem/infer_dumps_deps_if_verbose_build.test
-
-    # This test apparently requires Python 2 (strings are assumed to be bytes-like), but the build
-    # process overall now otherwise requires Python 3 (which is what we have updated to). A fix PR
-    # has been submitted upstream.
-    rm $SWIFT_SOURCE_ROOT/swift/validation-test/SIL/verify_all_overlays.py
-
-    # TODO: consider fixing and re-adding. This test fails due to a non-standard "install_prefix".
-    rm $SWIFT_SOURCE_ROOT/swift/validation-test/Python/build_swift.swift
-
-    # We cannot handle the SDK location being in "Weird Location" due to Nix isolation.
-    rm $SWIFT_SOURCE_ROOT/swift/test/DebugInfo/compiler-flags.swift
-
-    # TODO: Fix issue with ld.gold invoked from script finding crtbeginS.o and crtendS.o.
-    rm $SWIFT_SOURCE_ROOT/swift/test/IRGen/ELF-remove-autolink-section.swift
-
-    # The following two tests fail because we use don't use the bundled libicu:
-    # [SOURCE_DIR/utils/build-script] ERROR: can't find source directory for libicu (tried /build/src/icu)
-    rm $SWIFT_SOURCE_ROOT/swift/validation-test/BuildSystem/default_build_still_performs_epilogue_opts_after_split.test
-    rm $SWIFT_SOURCE_ROOT/swift/validation-test/BuildSystem/test_early_swift_driver_and_infer.swift
-
-    # TODO: This test fails for some unknown reason
-    rm $SWIFT_SOURCE_ROOT/swift/test/Serialization/restrict-swiftmodule-to-revision.swift
-
-    # This test was flaky in ofborg, see #186476
-    rm $SWIFT_SOURCE_ROOT/swift/test/AutoDiff/compiler_crashers_fixed/sr14290-missing-debug-scopes-in-pullback-trampoline.swift
-
-    # TODO: consider using stress-tester and integration-test.
-
-    # Match the wrapped version of Swift to be installed.
-    export LIBRARY_PATH=${lib.makeLibraryPath [icu libgcc libuuid]}:$l
-
-    checkTarget=check-swift-all-${stdenv.hostPlatform.parsed.kernel.name}-${stdenv.hostPlatform.parsed.cpu.name}
-    ninjaFlags='-C buildbot_linux/swift-${stdenv.hostPlatform.parsed.kernel.name}-${stdenv.hostPlatform.parsed.cpu.name}'
-    ninjaCheckPhase
-  '';
-
-  installPhase = ''
-    mkdir -p $out
-
-    # Extract the generated tarball into the store.
-    tar xf $INSTALLABLE_PACKAGE -C $out --strip-components=3 ''${out/#\/}
-    find $out -type d -empty -delete
-
-    # Fix installation weirdness, also present in Apple’s official tarballs.
-    mv $out/local/include/indexstore $out/include
-    rmdir $out/local/include $out/local
-    rm -r $out/bin/sdk-module-lists $out/bin/swift-api-checker.py
-
-    wrapProgram $out/bin/swift \
-      --set CC $out/bin/clang \
-      --suffix C_INCLUDE_PATH : $out/lib/swift/clang/include \
-      --suffix CPLUS_INCLUDE_PATH : $out/lib/swift/clang/include \
-      --suffix LIBRARY_PATH : ${lib.makeLibraryPath [icu libgcc libuuid]} \
-      --suffix PATH : ${lib.makeBinPath [ stdenv.cc.bintools ]}
-
-    wrapProgram $out/bin/swiftc \
-      --set CC $out/bin/clang \
-      --suffix C_INCLUDE_PATH : $out/lib/swift/clang/include \
-      --suffix CPLUS_INCLUDE_PATH : $out/lib/swift/clang/include \
-      --suffix LIBRARY_PATH : ${lib.makeLibraryPath [icu libgcc libuuid]} \
-      --suffix PATH : ${lib.makeBinPath [ stdenv.cc.bintools ]}
-  '';
-
-  # Hack to avoid build and install directories in RPATHs.
-  preFixup = "rm -rf $SWIFT_BUILD_ROOT $SWIFT_INSTALL_DIR";
-
-  meta = with lib; {
-    description = "The Swift Programming Language";
-    homepage = "https://github.com/apple/swift";
-    maintainers = with maintainers; [ dtzWill trepetti dduan trundle ];
-    license = licenses.asl20;
-    # Swift doesn't support 32-bit Linux, unknown on other platforms.
-    platforms = platforms.linux;
-    badPlatforms = platforms.i686;
-    timeout = 86400; # 24 hours.
-  };
-}
+in self
--- a/pkgs/development/compilers/swift/foundation/default.nix
+++ b/pkgs/development/compilers/swift/foundation/default.nix
@ -0,0 +1,61 @@
+# TODO: We already package the CoreFoundation component of Foundation in:
+#   pkgs/os-specific/darwin/swift-corelibs/corefoundation.nix
+# This is separate because the CF build is completely different and part of
+# stdenv. Merging the two was kept outside of the scope of Swift work.
+
+{ lib
+, stdenv
+, callPackage
+, cmake
+, ninja
+, swift
+, Dispatch
+, icu
+, libxml2
+, curl
+}:
+
+let
+  sources = callPackage ../sources.nix { };
+in stdenv.mkDerivation {
+  pname = "swift-corelibs-foundation";
+
+  inherit (sources) version;
+  src = sources.swift-corelibs-foundation;
+
+  outputs = [ "out" "dev" ];
+
+  nativeBuildInputs = [ cmake ninja swift ];
+  buildInputs = [ icu libxml2 curl ];
+  propagatedBuildInputs = [ Dispatch ];
+
+  preConfigure = ''
+    # Fails to build with -D_FORTIFY_SOURCE.
+    NIX_HARDENING_ENABLE=''${NIX_HARDENING_ENABLE/fortify/}
+  '';
+
+  postInstall = ''
+    # Split up the output.
+    mkdir $dev
+    mv $out/lib/swift/${swift.swiftOs} $out/swiftlibs
+    mv $out/lib/swift $dev/include
+    mkdir $out/lib/swift
+    mv $out/swiftlibs $out/lib/swift/${swift.swiftOs}
+
+    # Provide a CMake module. This is primarily used to glue together parts of
+    # the Swift toolchain. Modifying the CMake config to do this for us is
+    # otherwise more trouble.
+    mkdir -p $dev/lib/cmake/Foundation
+    export dylibExt="${stdenv.hostPlatform.extensions.sharedLibrary}"
+    export swiftOs="${swift.swiftOs}"
+    substituteAll ${./glue.cmake} $dev/lib/cmake/Foundation/FoundationConfig.cmake
+  '';
+
+  meta = {
+    description = "Core utilities, internationalization, and OS independence for Swift";
+    homepage = "https://github.com/apple/swift-corelibs-foundation";
+    platforms = lib.platforms.linux;
+    license = lib.licenses.asl20;
+    maintainers = with lib.maintainers; [ dtzWill trepetti dduan trundle stephank ];
+  };
+}
--- a/pkgs/development/compilers/swift/foundation/glue.cmake
+++ b/pkgs/development/compilers/swift/foundation/glue.cmake
@ -0,0 +1,8 @@
+add_library(Foundation SHARED IMPORTED)
+set_property(TARGET Foundation PROPERTY IMPORTED_LOCATION "@out@/lib/swift/@swiftOs@/libFoundation@dylibExt@")
+
+add_library(FoundationNetworking SHARED IMPORTED)
+set_property(TARGET FoundationNetworking PROPERTY IMPORTED_LOCATION "@out@/lib/swift/@swiftOs@/libFoundationNetworking@dylibExt@")
+
+add_library(FoundationXML SHARED IMPORTED)
+set_property(TARGET FoundationXML PROPERTY IMPORTED_LOCATION "@out@/lib/swift/@swiftOs@/libFoundationXML@dylibExt@")
--- a/pkgs/development/compilers/swift/libdispatch/default.nix
+++ b/pkgs/development/compilers/swift/libdispatch/default.nix
@ -0,0 +1,42 @@
+{ lib
+, stdenv
+, callPackage
+, cmake
+, ninja
+, useSwift ? true, swift
+}:
+
+let
+  sources = callPackage ../sources.nix { };
+in stdenv.mkDerivation {
+  pname = "swift-corelibs-libdispatch";
+
+  inherit (sources) version;
+  src = sources.swift-corelibs-libdispatch;
+
+  outputs = [ "out" "dev" "man" ];
+
+  nativeBuildInputs = [ cmake ]
+    ++ lib.optionals useSwift [ ninja swift ];
+
+  patches = [ ./disable-swift-overlay.patch ];
+
+  cmakeFlags = lib.optional useSwift "-DENABLE_SWIFT=ON";
+
+  postInstall = ''
+    # Provide a CMake module. This is primarily used to glue together parts of
+    # the Swift toolchain. Modifying the CMake config to do this for us is
+    # otherwise more trouble.
+    mkdir -p $dev/lib/cmake/dispatch
+    export dylibExt="${stdenv.hostPlatform.extensions.sharedLibrary}"
+    substituteAll ${./glue.cmake} $dev/lib/cmake/dispatch/dispatchConfig.cmake
+  '';
+
+  meta = {
+    description = "Grand Central Dispatch";
+    homepage = "https://github.com/apple/swift-corelibs-libdispatch";
+    platforms = lib.platforms.linux;
+    license = lib.licenses.asl20;
+    maintainers = with lib.maintainers; [ cmm dtzWill trepetti dduan trundle stephank ];
+  };
+}
--- a/pkgs/development/compilers/swift/libdispatch/disable-swift-overlay.patch
+++ b/pkgs/development/compilers/swift/libdispatch/disable-swift-overlay.patch
@ -0,0 +1,35 @@
+Enabling Swift support is normally intended for building an overlay for a
+Swift SDK, which changes the installation layout. Prevent this.
+
+--- a/CMakeLists.txt
+++ b/CMakeLists.txt
+@@ -287,7 +287,7 @@ configure_file("${PROJECT_SOURCE_DIR}/cmake/config.h.in"
+ add_compile_definitions($<$<OR:$<COMPILE_LANGUAGE:C>,$<COMPILE_LANGUAGE:CXX>>:HAVE_CONFIG_H>)
+ 
+ 
+-if(ENABLE_SWIFT)
+if(0)
+   set(INSTALL_TARGET_DIR "${CMAKE_INSTALL_LIBDIR}/swift$<$<NOT:$<BOOL:${BUILD_SHARED_LIBS}>>:_static>/$<LOWER_CASE:${CMAKE_SYSTEM_NAME}>" CACHE PATH "Path where the libraries will be installed")
+   set(INSTALL_DISPATCH_HEADERS_DIR "${CMAKE_INSTALL_LIBDIR}/swift$<$<NOT:$<BOOL:${BUILD_SHARED_LIBS}>>:_static>/dispatch" CACHE PATH "Path where the headers will be installed for libdispatch")
+   set(INSTALL_BLOCK_HEADERS_DIR "${CMAKE_INSTALL_LIBDIR}/swift$<$<NOT:$<BOOL:${BUILD_SHARED_LIBS}>>:_static>/Block" CACHE PATH "Path where the headers will be installed for the blocks runtime")
+--- a/man/CMakeLists.txt
+++ b/man/CMakeLists.txt
+@@ -1,6 +1,6 @@
+ 
+ # TODO(compnerd) add symlinks
+-if(NOT ENABLE_SWIFT)
+if(1)
+   install(FILES
+             dispatch.3
+             dispatch_after.3
+--- a/src/swift/CMakeLists.txt
+++ b/src/swift/CMakeLists.txt
+@@ -47,7 +47,7 @@ get_swift_host_arch(swift_arch)
+ install(FILES
+   ${CMAKE_CURRENT_BINARY_DIR}/swift/Dispatch.swiftmodule
+   ${CMAKE_CURRENT_BINARY_DIR}/swift/Dispatch.swiftdoc
+-  DESTINATION ${INSTALL_TARGET_DIR}/${swift_arch})
+  DESTINATION ${INSTALL_TARGET_DIR}/swift)
+ set_property(GLOBAL APPEND PROPERTY DISPATCH_EXPORTS swiftDispatch)
+ install(TARGETS swiftDispatch
+   EXPORT dispatchExports
--- a/pkgs/development/compilers/swift/libdispatch/glue.cmake
+++ b/pkgs/development/compilers/swift/libdispatch/glue.cmake
@ -0,0 +1,5 @@
+add_library(dispatch SHARED IMPORTED)
+set_property(TARGET dispatch PROPERTY IMPORTED_LOCATION "@out@/lib/libdispatch@dylibExt@")
+
+add_library(swiftDispatch SHARED IMPORTED)
+set_property(TARGET swiftDispatch PROPERTY IMPORTED_LOCATION "@out@/lib/libswiftDispatch@dylibExt@")
--- a/pkgs/development/compilers/swift/patches/0001-build-presets-linux-don-t-require-using-Ninja.patch
+++ b/pkgs/development/compilers/swift/patches/0001-build-presets-linux-don-t-require-using-Ninja.patch
@ -1,13 +0,0 @@
-Don't build Ninja, we use our own.
-
--- a/utils/build-presets.ini
-+++ b/utils/build-presets.ini
-@@ -779,7 +779,7 @@ swiftpm
-
- dash-dash
-
-build-ninja
-+# build-ninja
- install-llvm
- install-swift
- install-lldb
--- a/pkgs/development/compilers/swift/patches/0002-build-presets-linux-allow-custom-install-prefix.patch
+++ b/pkgs/development/compilers/swift/patches/0002-build-presets-linux-allow-custom-install-prefix.patch
@ -1,13 +0,0 @@
-Use custom install prefix.
-
--- a/utils/build-presets.ini
-+++ b/utils/build-presets.ini
-@@ -788,7 +788,7 @@
- install-swiftpm
- install-xctest
- install-libicu
-install-prefix=/usr
-+install-prefix=%(install_prefix)s
- install-libcxx
- install-sourcekit-lsp
- build-swift-static-stdlib
--- a/pkgs/development/compilers/swift/patches/0003-build-presets-linux-don-t-build-extra-libs.patch
+++ b/pkgs/development/compilers/swift/patches/0003-build-presets-linux-don-t-build-extra-libs.patch
@ -1,23 +0,0 @@
-Disable targets, where we use Nix packages.
-
--- a/utils/build-presets.ini
-+++ b/utils/build-presets.ini
-@@ -818,8 +818,6 @@
- swiftpm
- swift-driver
- xctest
-libicu
-libcxx
- swiftdocc
- 
- # build-ninja
-@@ -830,9 +828,7 @@
- install-swiftpm
- install-swift-driver
- install-xctest
-install-libicu
- install-prefix=%(install_prefix)s
-install-libcxx
- install-sourcekit-lsp
- install-swiftdocc
- build-swift-static-stdlib
--- a/pkgs/development/compilers/swift/patches/0004-build-presets-linux-plumb-extra-cmake-options.patch
+++ b/pkgs/development/compilers/swift/patches/0004-build-presets-linux-plumb-extra-cmake-options.patch
@ -1,13 +0,0 @@
-Plumb extra-cmake-options.
-
--- a/utils/build-presets.ini
-+++ b/utils/build-presets.ini
-@@ -812,6 +812,8 @@
- # Path to the .tar.gz package we would create.
- installable-package=%(installable_package)s
-
-+extra-cmake-options=%(extra_cmake_options)s
-+
- [preset: buildbot_linux]
- mixin-preset=mixin_linux_installation
- build-subdir=buildbot_linux
--- a/pkgs/development/compilers/swift/patches/0006-clang-purity.patch
+++ b/pkgs/development/compilers/swift/patches/0006-clang-purity.patch
@ -1,16 +0,0 @@
-Apply the "purity" patch (updated for 5.4.2).
-
--- a/lib/Driver/ToolChains/Gnu.cpp
-+++ b/lib/Driver/ToolChains/Gnu.cpp
-@@ -488,11 +488,5 @@
-     if (Args.hasArg(options::OPT_rdynamic))
-       CmdArgs.push_back("-export-dynamic");
-
-    if (!Args.hasArg(options::OPT_shared) && !IsStaticPIE) {
-      CmdArgs.push_back("-dynamic-linker");
-      CmdArgs.push_back(Args.MakeArgString(Twine(D.DyldPrefix) +
-                                           ToolChain.getDynamicLinker(Args)));
-    }
-   }
-
-   CmdArgs.push_back("-o");
--- a/pkgs/development/compilers/swift/patches/0007-build-presets-linux-os-stdlib.patch
+++ b/pkgs/development/compilers/swift/patches/0007-build-presets-linux-os-stdlib.patch
@ -1,13 +0,0 @@
-Use os-stdlib in tests.
-
--- a/utils/build-presets.ini
-+++ b/utils/build-presets.ini
-@@ -872,7 +872,7 @@
- indexstore-db
- sourcekit-lsp
- swiftdocc
-lit-args=-v --time-tests
-+lit-args=-v --time-tests --param use_os_stdlib
- 
- # rdar://problem/31454823
- lldb-test-swift-only
--- a/pkgs/development/compilers/swift/sourcekit-lsp/default.nix
+++ b/pkgs/development/compilers/swift/sourcekit-lsp/default.nix
@ -0,0 +1,72 @@
+{ lib
+, stdenv
+, callPackage
+, swift
+, swiftpm
+, swiftpm2nix
+, Foundation
+, XCTest
+, sqlite
+, ncurses
+, CryptoKit
+, LocalAuthentication
+}:
+let
+  sources = callPackage ../sources.nix { };
+  generated = swiftpm2nix.helpers ./generated;
+
+  # On Darwin, we only want ncurses in the linker search path, because headers
+  # are part of libsystem. Adding its headers to the search path causes strange
+  # mixing and errors.
+  # TODO: Find a better way to prevent this conflict.
+  ncursesInput = if stdenv.isDarwin then ncurses.out else ncurses;
+in
+stdenv.mkDerivation {
+  pname = "sourcekit-lsp";
+
+  inherit (sources) version;
+  src = sources.sourcekit-lsp;
+
+  nativeBuildInputs = [ swift swiftpm ];
+  buildInputs = [
+    Foundation
+    XCTest
+    sqlite
+    ncursesInput
+  ]
+    ++ lib.optionals stdenv.isDarwin [ CryptoKit LocalAuthentication ];
+
+  configurePhase = generated.configure + ''
+    swiftpmMakeMutable indexstore-db
+    patch -p1 -d .build/checkouts/indexstore-db -i ${./patches/indexstore-db-macos-target.patch}
+
+    # This toggles a section specific to Xcode XCTest, which doesn't work on
+    # Darwin, where we also use swift-corelibs-xctest.
+    substituteInPlace Sources/LSPTestSupport/PerfTestCase.swift \
+      --replace '#if os(macOS)' '#if false'
+
+    # Required to link with swift-corelibs-xctest on Darwin.
+    export SWIFTTSC_MACOS_DEPLOYMENT_TARGET=10.12
+  '';
+
+  # TODO: BuildServerBuildSystemTests fails
+  #doCheck = true;
+
+  installPhase = ''
+    binPath="$(swiftpmBinPath)"
+    mkdir -p $out/bin
+    cp $binPath/sourcekit-lsp $out/bin/
+  '';
+
+  # Canary to verify output of our Swift toolchain does not depend on the Swift
+  # compiler itself. (Only its 'lib' output.)
+  disallowedRequisites = [ swift.swift ];
+
+  meta = {
+    description = "Language Server Protocol implementation for Swift and C-based languages";
+    homepage = "https://github.com/apple/sourcekit-lsp";
+    platforms = with lib.platforms; linux ++ darwin;
+    license = lib.licenses.asl20;
+    maintainers = with lib.maintainers; [ dtzWill trepetti dduan trundle stephank ];
+  };
+}
--- a/pkgs/development/compilers/swift/sourcekit-lsp/generated/default.nix
+++ b/pkgs/development/compilers/swift/sourcekit-lsp/generated/default.nix
@ -0,0 +1,16 @@
+# This file was generated by swiftpm2nix.
+{
+  workspaceStateFile = ./workspace-state.json;
+  hashes = {
+    "indexstore-db" = "005vvkrncgpryzrn0hzgsapflpyga0n7152b2b565wislpx90cwl";
+    "swift-argument-parser" = "1jph9w7lk9nr20fsv2c8p4hisx3dda817fh7pybd0r0j1jwa9nmw";
+    "swift-collections" = "0l0pv16zil3n7fac7mdf5qxklxr5rwiig5bixgca1ybq7arlnv7i";
+    "swift-crypto" = "020b8q4ss2k7a65r5dgh59z40i6sn7ij1allxkh8c8a9d0jzn313";
+    "swift-driver" = "0nblvs47kh2hl1l70rmrbablx4m5i27w8l3dfrv2h7zccqr8jl0a";
+    "swift-llbuild" = "1bvqbj8ji72ilh3ah2mw411jwzbbjxjyasa6sg4b8da0kqia4021";
+    "swift-package-manager" = "16qvk14f1l0hf5bphx6qk51nn9d36a2iw5v3sgkvmqi8h7l4kqg5";
+    "swift-system" = "0402hkx2q2dv27gccnn8ma79ngvwiwzkhcv4zlcdldmy6cgi0px7";
+    "swift-tools-support-core" = "1ryd5iyx5mfv8bhyq3bf08z7nv886chzzqnmwaj16r2cry9yml7c";
+    "Yams" = "11abhcfkmqm3cmh7vp7rqzvxd1zj02j2866a2pp6v9m89456xb76";
+  };
+}
--- a/pkgs/development/compilers/swift/sourcekit-lsp/generated/workspace-state.json
+++ b/pkgs/development/compilers/swift/sourcekit-lsp/generated/workspace-state.json
@ -0,0 +1,178 @@
+{
+  "object": {
+    "artifacts": [],
+    "dependencies": [
+      {
+        "basedOn": null,
+        "packageRef": {
+          "identity": "indexstore-db",
+          "kind": "remoteSourceControl",
+          "location": "https://github.com/apple/indexstore-db.git",
+          "name": "IndexStoreDB"
+        },
+        "state": {
+          "checkoutState": {
+            "branch": "main",
+            "revision": "2ff1c0491248cd958a2ac05da9aa613eb27a8eeb"
+          },
+          "name": "sourceControlCheckout"
+        },
+        "subpath": "indexstore-db"
+      },
+      {
+        "basedOn": null,
+        "packageRef": {
+          "identity": "swift-argument-parser",
+          "kind": "remoteSourceControl",
+          "location": "https://github.com/apple/swift-argument-parser.git",
+          "name": "swift-argument-parser"
+        },
+        "state": {
+          "checkoutState": {
+            "revision": "e394bf350e38cb100b6bc4172834770ede1b7232",
+            "version": "1.0.3"
+          },
+          "name": "sourceControlCheckout"
+        },
+        "subpath": "swift-argument-parser"
+      },
+      {
+        "basedOn": null,
+        "packageRef": {
+          "identity": "swift-collections",
+          "kind": "remoteSourceControl",
+          "location": "https://github.com/apple/swift-collections.git",
+          "name": "swift-collections"
+        },
+        "state": {
+          "checkoutState": {
+            "revision": "f504716c27d2e5d4144fa4794b12129301d17729",
+            "version": "1.0.3"
+          },
+          "name": "sourceControlCheckout"
+        },
+        "subpath": "swift-collections"
+      },
+      {
+        "basedOn": null,
+        "packageRef": {
+          "identity": "swift-crypto",
+          "kind": "remoteSourceControl",
+          "location": "https://github.com/apple/swift-crypto.git",
+          "name": "swift-crypto"
+        },
+        "state": {
+          "checkoutState": {
+            "revision": "ddb07e896a2a8af79512543b1c7eb9797f8898a5",
+            "version": "1.1.7"
+          },
+          "name": "sourceControlCheckout"
+        },
+        "subpath": "swift-crypto"
+      },
+      {
+        "basedOn": null,
+        "packageRef": {
+          "identity": "swift-driver",
+          "kind": "remoteSourceControl",
+          "location": "https://github.com/apple/swift-driver.git",
+          "name": "swift-driver"
+        },
+        "state": {
+          "checkoutState": {
+            "branch": "main",
+            "revision": "6c71f58f89d65eb79f1f6b32a707ddc39cec5ad6"
+          },
+          "name": "sourceControlCheckout"
+        },
+        "subpath": "swift-driver"
+      },
+      {
+        "basedOn": null,
+        "packageRef": {
+          "identity": "swift-llbuild",
+          "kind": "remoteSourceControl",
+          "location": "https://github.com/apple/swift-llbuild.git",
+          "name": "llbuild"
+        },
+        "state": {
+          "checkoutState": {
+            "branch": "main",
+            "revision": "d99c31577c60a247b065d29289a44fbdd141e2be"
+          },
+          "name": "sourceControlCheckout"
+        },
+        "subpath": "swift-llbuild"
+      },
+      {
+        "basedOn": null,
+        "packageRef": {
+          "identity": "swift-package-manager",
+          "kind": "remoteSourceControl",
+          "location": "https://github.com/apple/swift-package-manager.git",
+          "name": "SwiftPM"
+        },
+        "state": {
+          "checkoutState": {
+            "branch": "main",
+            "revision": "f04ad469a6053d713c2fb854fbeb27ee3e6c9dee"
+          },
+          "name": "sourceControlCheckout"
+        },
+        "subpath": "swift-package-manager"
+      },
+      {
+        "basedOn": null,
+        "packageRef": {
+          "identity": "swift-system",
+          "kind": "remoteSourceControl",
+          "location": "https://github.com/apple/swift-system.git",
+          "name": "swift-system"
+        },
+        "state": {
+          "checkoutState": {
+            "revision": "836bc4557b74fe6d2660218d56e3ce96aff76574",
+            "version": "1.1.1"
+          },
+          "name": "sourceControlCheckout"
+        },
+        "subpath": "swift-system"
+      },
+      {
+        "basedOn": null,
+        "packageRef": {
+          "identity": "swift-tools-support-core",
+          "kind": "remoteSourceControl",
+          "location": "https://github.com/apple/swift-tools-support-core.git",
+          "name": "swift-tools-support-core"
+        },
+        "state": {
+          "checkoutState": {
+            "branch": "main",
+            "revision": "0220fc394f2ae820eeacd754fb2c7ce211e9979e"
+          },
+          "name": "sourceControlCheckout"
+        },
+        "subpath": "swift-tools-support-core"
+      },
+      {
+        "basedOn": null,
+        "packageRef": {
+          "identity": "yams",
+          "kind": "remoteSourceControl",
+          "location": "https://github.com/jpsim/Yams.git",
+          "name": "Yams"
+        },
+        "state": {
+          "checkoutState": {
+            "revision": "01835dc202670b5bb90d07f3eae41867e9ed29f6",
+            "version": "5.0.1"
+          },
+          "name": "sourceControlCheckout"
+        },
+        "subpath": "Yams"
+      }
+    ]
+  },
+  "version": 5
+}
--- a/pkgs/development/compilers/swift/sourcekit-lsp/patches/indexstore-db-macos-target.patch
+++ b/pkgs/development/compilers/swift/sourcekit-lsp/patches/indexstore-db-macos-target.patch
@ -0,0 +1,12 @@
+Raise the deployment target of IndexStoreDB so it can link against our XCTest.
+
+--- a/Package.swift
+++ b/Package.swift
+@@ -4,6 +4,7 @@ import PackageDescription
+
+ let package = Package(
+   name: "IndexStoreDB",
+  platforms: [.macOS("10.12")],
+   products: [
+     .library(
+       name: "IndexStoreDB",
--- a/pkgs/development/compilers/swift/sources.nix
+++ b/pkgs/development/compilers/swift/sources.nix
@ -0,0 +1,33 @@
+{ lib, fetchFromGitHub }:
+
+let
+
+  # These packages are all part of the Swift toolchain, and have a single
+  # upstream version that should match. We also list the hashes here so a basic
+  # version upgrade touches only this file.
+  version = "5.7";
+  hashes = {
+    llvm-project = "sha256-uW6dEAFaDOlHXnq8lFYxrKNLRPEukauZJxX4UCpWpIY=";
+    sourcekit-lsp = "sha256-uA3a+kAqI+XFzkDFEJ8XuRTgfYqacEuTsOU289Im+0Y=";
+    swift = "sha256-n8WVQYinAyIj4wmQnDhvPsH+t8ydANkGbjFJ6blfHOY=";
+    swift-cmark = "sha256-f0BoTs4HYdx/aJ9HIGCWMalhl8PvClWD6R4QK3qSgAw=";
+    swift-corelibs-foundation = "sha256-6XUSC6759dcG24YapWicjRzUnmVVe0QPSsLEw4sQNjI=";
+    swift-corelibs-libdispatch = "sha256-1qbXiC1k9+T+L6liqXKg6EZXqem6KEEx8OctuL4Kb2o=";
+    swift-corelibs-xctest = "sha256-qLUO9/3tkJWorDMEHgHd8VC3ovLLq/UWXJWMtb6CMN0=";
+    swift-docc = "sha256-WlXJMAnrlVPCM+iCIhG0Gyho76BsC2yVBEpX3m/WiIQ=";
+    swift-docc-render-artifact = "sha256-ttdurN/K7OX+I4577jG3YGeRs+GLUTc7BiiEZGmFD+s=";
+    swift-driver = "sha256-sk7XWXYR1MGPEeVxA6eA/vxhN6Gq16iD1RHpVstL3zE=";
+    swift-experimental-string-processing = "sha256-Ar9fQWi8bYSvGErrS0SWrxIxwEwCjsYIZcWweZ8bV28=";
+    swift-package-manager = "sha256-MZah+/XfeK46YamxwuE3Kiv+u5bj7VmjEh6ztDF+0j4=";
+  };
+
+  # Create fetch derivations.
+  sources = lib.mapAttrs (repo: hash: fetchFromGitHub {
+    owner = "apple";
+    inherit repo;
+    rev = "swift-${version}-RELEASE";
+    name = "${repo}-${version}-src";
+    hash = hashes.${repo};
+  }) hashes;
+
+in sources // { inherit version; }
--- a/pkgs/development/compilers/swift/swift-docc/default.nix
+++ b/pkgs/development/compilers/swift/swift-docc/default.nix
@ -0,0 +1,53 @@
+{ lib
+, stdenv
+, callPackage
+, swift
+, swiftpm
+, swiftpm2nix
+, Foundation
+, XCTest
+, CryptoKit
+, LocalAuthentication
+}:
+let
+  sources = callPackage ../sources.nix { };
+  generated = swiftpm2nix.helpers ./generated;
+in
+stdenv.mkDerivation {
+  pname = "swift-docc";
+
+  inherit (sources) version;
+  src = sources.swift-docc;
+  # TODO: We could build this from `apple/swift-docc-render` source, but that
+  # repository is not tagged.
+  renderArtifact = sources.swift-docc-render-artifact;
+
+  nativeBuildInputs = [ swift swiftpm ];
+  buildInputs = [ Foundation XCTest ]
+    ++ lib.optionals stdenv.isDarwin [ CryptoKit LocalAuthentication ];
+
+  configurePhase = generated.configure;
+
+  # TODO: Tests depend on indexstore-db being provided by an existing Swift
+  # toolchain. (ie. looks for `../lib/libIndexStore.so` relative to swiftc.
+  #doCheck = true;
+
+  installPhase = ''
+    binPath="$(swiftpmBinPath)"
+    mkdir -p $out/bin $out/share/docc
+    cp $binPath/docc $out/bin/
+    ln -s $renderArtifact/dist $out/share/docc/render
+  '';
+
+  # Canary to verify output of our Swift toolchain does not depend on the Swift
+  # compiler itself. (Only its 'lib' output.)
+  disallowedRequisites = [ swift.swift ];
+
+  meta = {
+    description = "Documentation compiler for Swift";
+    homepage = "https://github.com/apple/swift-docc";
+    platforms = with lib.platforms; linux ++ darwin;
+    license = lib.licenses.asl20;
+    maintainers = with lib.maintainers; [ dtzWill trepetti dduan trundle stephank ];
+  };
+}
--- a/pkgs/development/compilers/swift/swift-docc/generated/default.nix
+++ b/pkgs/development/compilers/swift/swift-docc/generated/default.nix
@ -0,0 +1,15 @@
+# This file was generated by swiftpm2nix.
+{
+  workspaceStateFile = ./workspace-state.json;
+  hashes = {
+    "swift-argument-parser" = "070gip241dgn3d0nxgwxva4vp6kbnf11g01q5yaq6kmflcmz58f2";
+    "swift-cmark" = "0xfchdgls3070z16in8ks69y8fpiajmyk7lmp5h7ym7164isa6bb";
+    "swift-crypto" = "0h054rq14jyg94aiymmp37vqz60a13dlczp5g09pln724j4ypv92";
+    "swift-docc-plugin" = "11d6nhi139yzk1lxxrixsbgyj1bnvmh40wj30y725q83nqq49ljh";
+    "swift-docc-symbolkit" = "14hb2wc09hisf2r2yny17z28z0m58cf4lnqaczad2x2hk4s1iayi";
+    "swift-lmdb" = "1m5y6x2vs1wflcv2c57rx87gh12sy0hkwy5iy9inxmda2mcs8qcb";
+    "swift-markdown" = "09270bfrwlp904cma29hsbhr1p25v8kwgvhcfi7lg2av7aaknd97";
+    "swift-nio" = "04bvay94b34ynmlvgyl9a7f431l3cf8k2zr483spv8mvyh1hxiqn";
+    "swift-nio-ssl" = "1ak4aldilmz0pnfgbwq1x4alr38nfyvx2pz7p2vi2plf82da80g5";
+  };
+}
--- a/pkgs/development/compilers/swift/swift-docc/generated/workspace-state.json
+++ b/pkgs/development/compilers/swift/swift-docc/generated/workspace-state.json
@ -0,0 +1,161 @@
+{
+  "object": {
+    "artifacts": [],
+    "dependencies": [
+      {
+        "basedOn": null,
+        "packageRef": {
+          "identity": "swift-argument-parser",
+          "kind": "remoteSourceControl",
+          "location": "https://github.com/apple/swift-argument-parser",
+          "name": "swift-argument-parser"
+        },
+        "state": {
+          "checkoutState": {
+            "revision": "d2930e8fcf9c33162b9fcc1d522bc975e2d4179b",
+            "version": "1.0.1"
+          },
+          "name": "sourceControlCheckout"
+        },
+        "subpath": "swift-argument-parser"
+      },
+      {
+        "basedOn": null,
+        "packageRef": {
+          "identity": "swift-cmark",
+          "kind": "remoteSourceControl",
+          "location": "https://github.com/apple/swift-cmark.git",
+          "name": "cmark-gfm"
+        },
+        "state": {
+          "checkoutState": {
+            "branch": "release/5.7-gfm",
+            "revision": "792c1c3326327515ce9bf64c44196b7f4daab9a6"
+          },
+          "name": "sourceControlCheckout"
+        },
+        "subpath": "swift-cmark"
+      },
+      {
+        "basedOn": null,
+        "packageRef": {
+          "identity": "swift-crypto",
+          "kind": "remoteSourceControl",
+          "location": "https://github.com/apple/swift-crypto.git",
+          "name": "swift-crypto"
+        },
+        "state": {
+          "checkoutState": {
+            "revision": "9680b7251cd2be22caaed8f1468bd9e8915a62fb",
+            "version": "1.1.2"
+          },
+          "name": "sourceControlCheckout"
+        },
+        "subpath": "swift-crypto"
+      },
+      {
+        "basedOn": null,
+        "packageRef": {
+          "identity": "swift-docc-plugin",
+          "kind": "remoteSourceControl",
+          "location": "https://github.com/apple/swift-docc-plugin",
+          "name": "SwiftDocCPlugin"
+        },
+        "state": {
+          "checkoutState": {
+            "revision": "3303b164430d9a7055ba484c8ead67a52f7b74f6",
+            "version": "1.0.0"
+          },
+          "name": "sourceControlCheckout"
+        },
+        "subpath": "swift-docc-plugin"
+      },
+      {
+        "basedOn": null,
+        "packageRef": {
+          "identity": "swift-docc-symbolkit",
+          "kind": "remoteSourceControl",
+          "location": "https://github.com/apple/swift-docc-symbolkit",
+          "name": "SymbolKit"
+        },
+        "state": {
+          "checkoutState": {
+            "branch": "release/5.7",
+            "revision": "8682202025906dce29a8b04f9263f40ba87b89d8"
+          },
+          "name": "sourceControlCheckout"
+        },
+        "subpath": "swift-docc-symbolkit"
+      },
+      {
+        "basedOn": null,
+        "packageRef": {
+          "identity": "swift-lmdb",
+          "kind": "remoteSourceControl",
+          "location": "https://github.com/apple/swift-lmdb.git",
+          "name": "CLMDB"
+        },
+        "state": {
+          "checkoutState": {
+            "branch": "release/5.7",
+            "revision": "6ea45a7ebf6d8f72bd299dfcc3299e284bbb92ee"
+          },
+          "name": "sourceControlCheckout"
+        },
+        "subpath": "swift-lmdb"
+      },
+      {
+        "basedOn": null,
+        "packageRef": {
+          "identity": "swift-markdown",
+          "kind": "remoteSourceControl",
+          "location": "https://github.com/apple/swift-markdown.git",
+          "name": "swift-markdown"
+        },
+        "state": {
+          "checkoutState": {
+            "branch": "release/5.7",
+            "revision": "d6cd065a7e4b6c3fad615dcd39890e095a2f63a2"
+          },
+          "name": "sourceControlCheckout"
+        },
+        "subpath": "swift-markdown"
+      },
+      {
+        "basedOn": null,
+        "packageRef": {
+          "identity": "swift-nio",
+          "kind": "remoteSourceControl",
+          "location": "https://github.com/apple/swift-nio.git",
+          "name": "swift-nio"
+        },
+        "state": {
+          "checkoutState": {
+            "revision": "1d425b0851ffa2695d488cce1d68df2539f42500",
+            "version": "2.31.2"
+          },
+          "name": "sourceControlCheckout"
+        },
+        "subpath": "swift-nio"
+      },
+      {
+        "basedOn": null,
+        "packageRef": {
+          "identity": "swift-nio-ssl",
+          "kind": "remoteSourceControl",
+          "location": "https://github.com/apple/swift-nio-ssl.git",
+          "name": "swift-nio-ssl"
+        },
+        "state": {
+          "checkoutState": {
+            "revision": "2e74773972bd6254c41ceeda827f229bccbf1c0f",
+            "version": "2.15.0"
+          },
+          "name": "sourceControlCheckout"
+        },
+        "subpath": "swift-nio-ssl"
+      }
+    ]
+  },
+  "version": 5
+}
--- a/pkgs/development/compilers/swift/swift-driver/default.nix
+++ b/pkgs/development/compilers/swift/swift-driver/default.nix
@ -0,0 +1,77 @@
+{ lib
+, stdenv
+, callPackage
+, fetchpatch
+, swift
+, swiftpm
+, swiftpm2nix
+, Foundation
+, XCTest
+, sqlite
+, ncurses
+, substituteAll
+}:
+let
+  sources = callPackage ../sources.nix { };
+  generated = swiftpm2nix.helpers ./generated;
+
+  # On Darwin, we only want ncurses in the linker search path, because headers
+  # are part of libsystem. Adding its headers to the search path causes strange
+  # mixing and errors.
+  # TODO: Find a better way to prevent this conflict.
+  ncursesInput = if stdenv.isDarwin then ncurses.out else ncurses;
+in
+stdenv.mkDerivation {
+  pname = "swift-driver";
+
+  inherit (sources) version;
+  src = sources.swift-driver;
+
+  nativeBuildInputs = [ swift swiftpm ];
+  buildInputs = [
+    Foundation
+    XCTest
+    sqlite
+    ncursesInput
+  ];
+
+  patches = [
+    ./patches/nix-resource-root.patch
+    ./patches/disable-catalyst.patch
+    ./patches/linux-fix-linking.patch
+    # TODO: Replace with branch patch once merged:
+    # https://github.com/apple/swift-driver/pull/1197
+    (fetchpatch {
+      url = "https://github.com/apple/swift-driver/commit/d3ef9cdf4871a58eddec7ff0e28fe611130da3f9.patch";
+      hash = "sha256-eVBaKN6uzj48ZnHtwGV0k5ChKjak1tDCyE+wTdyGq2c=";
+    })
+    # Prevent a warning about SDK directories we don't have.
+    (substituteAll {
+      src = ./patches/prevent-sdk-dirs-warnings.patch;
+      inherit (builtins) storeDir;
+    })
+  ];
+
+  configurePhase = generated.configure;
+
+  # TODO: Tests depend on indexstore-db being provided by an existing Swift
+  # toolchain. (ie. looks for `../lib/libIndexStore.so` relative to swiftc.
+  #doCheck = true;
+
+  # TODO: Darwin-specific installation includes more, but not sure why.
+  installPhase = ''
+    binPath="$(swiftpmBinPath)"
+    mkdir -p $out/bin
+    for executable in swift-driver swift-help swift-build-sdk-interfaces; do
+      cp $binPath/$executable $out/bin/
+    done
+  '';
+
+  meta = {
+    description = "Swift compiler driver";
+    homepage = "https://github.com/apple/swift-driver";
+    platforms = with lib.platforms; linux ++ darwin;
+    license = lib.licenses.asl20;
+    maintainers = with lib.maintainers; [ dtzWill trepetti dduan trundle stephank ];
+  };
+}
--- a/pkgs/development/compilers/swift/swift-driver/generated/default.nix
+++ b/pkgs/development/compilers/swift/swift-driver/generated/default.nix
@ -0,0 +1,11 @@
+# This file was generated by swiftpm2nix.
+{
+  workspaceStateFile = ./workspace-state.json;
+  hashes = {
+    "swift-argument-parser" = "11did5snqj8chcbdbiyx84mpif940ls2pr1iikwivvfp63i248hm";
+    "swift-llbuild" = "07zbp2dyfqd1bnyg7snpr9brn40jf22ivly5v10mql3hrg76a18h";
+    "swift-system" = "0402hkx2q2dv27gccnn8ma79ngvwiwzkhcv4zlcdldmy6cgi0px7";
+    "swift-tools-support-core" = "1vabl1z5sm2lrd75f5c781rkrq0liinpjvnrjr6i6r8cqrp0q5jb";
+    "Yams" = "1893y13sis2aimi1a5kgkczbf06z4yig054xb565yg2xm13srb45";
+  };
+}
--- a/pkgs/development/compilers/swift/swift-driver/generated/workspace-state.json
+++ b/pkgs/development/compilers/swift/swift-driver/generated/workspace-state.json
@ -0,0 +1,93 @@
+{
+  "object": {
+    "artifacts": [],
+    "dependencies": [
+      {
+        "basedOn": null,
+        "packageRef": {
+          "identity": "swift-argument-parser",
+          "kind": "remoteSourceControl",
+          "location": "https://github.com/apple/swift-argument-parser.git",
+          "name": "swift-argument-parser"
+        },
+        "state": {
+          "checkoutState": {
+            "revision": "e1465042f195f374b94f915ba8ca49de24300a0d",
+            "version": "1.0.2"
+          },
+          "name": "sourceControlCheckout"
+        },
+        "subpath": "swift-argument-parser"
+      },
+      {
+        "basedOn": null,
+        "packageRef": {
+          "identity": "swift-llbuild",
+          "kind": "remoteSourceControl",
+          "location": "https://github.com/apple/swift-llbuild.git",
+          "name": "llbuild"
+        },
+        "state": {
+          "checkoutState": {
+            "branch": "release/5.7",
+            "revision": "564424db5fdb62dcb5d863bdf7212500ef03a87b"
+          },
+          "name": "sourceControlCheckout"
+        },
+        "subpath": "swift-llbuild"
+      },
+      {
+        "basedOn": null,
+        "packageRef": {
+          "identity": "swift-system",
+          "kind": "remoteSourceControl",
+          "location": "https://github.com/apple/swift-system.git",
+          "name": "swift-system"
+        },
+        "state": {
+          "checkoutState": {
+            "revision": "836bc4557b74fe6d2660218d56e3ce96aff76574",
+            "version": "1.1.1"
+          },
+          "name": "sourceControlCheckout"
+        },
+        "subpath": "swift-system"
+      },
+      {
+        "basedOn": null,
+        "packageRef": {
+          "identity": "swift-tools-support-core",
+          "kind": "remoteSourceControl",
+          "location": "https://github.com/apple/swift-tools-support-core.git",
+          "name": "swift-tools-support-core"
+        },
+        "state": {
+          "checkoutState": {
+            "branch": "release/5.7",
+            "revision": "afc0938503bac012f76ceb619d031f63edc4c5f7"
+          },
+          "name": "sourceControlCheckout"
+        },
+        "subpath": "swift-tools-support-core"
+      },
+      {
+        "basedOn": null,
+        "packageRef": {
+          "identity": "yams",
+          "kind": "remoteSourceControl",
+          "location": "https://github.com/jpsim/Yams.git",
+          "name": "Yams"
+        },
+        "state": {
+          "checkoutState": {
+            "revision": "9ff1cc9327586db4e0c8f46f064b6a82ec1566fa",
+            "version": "4.0.6"
+          },
+          "name": "sourceControlCheckout"
+        },
+        "subpath": "Yams"
+      }
+    ]
+  },
+  "version": 5
+}
--- a/pkgs/development/compilers/swift/swift-driver/patches/disable-catalyst.patch
+++ b/pkgs/development/compilers/swift/swift-driver/patches/disable-catalyst.patch
@ -0,0 +1,17 @@
+Tries to parse SDKSettings.plist looking for a Catalyst version map, but we
+don't currently support this.
+
+--- a/Sources/SwiftDriver/Toolchains/DarwinToolchain.swift
+++ b/Sources/SwiftDriver/Toolchains/DarwinToolchain.swift
+@@ -297,11 +297,7 @@ public final class DarwinToolchain: Toolchain {
+                                                debugDescription: "Malformed version string")
+       }
+       self.version = version
+-      if self.canonicalName.hasPrefix("macosx") {
+-        self.versionMap = try keyedContainer.decode(VersionMap.self, forKey: .versionMap)
+-      } else {
+         self.versionMap = VersionMap()
+-      }
+     }
+ 
+ 
--- a/pkgs/development/compilers/swift/swift-driver/patches/linux-fix-linking.patch
+++ b/pkgs/development/compilers/swift/swift-driver/patches/linux-fix-linking.patch
@ -0,0 +1,40 @@
+--- a/Sources/SwiftDriver/Jobs/GenericUnixToolchain+LinkerSupport.swift
+++ b/Sources/SwiftDriver/Jobs/GenericUnixToolchain+LinkerSupport.swift
+@@ -9,6 +9,7 @@
+ // See https://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
+ //
+ //===----------------------------------------------------------------------===//
+import Foundation
+ import TSCBasic
+ import SwiftOptions
+ 
+@@ -116,7 +117,20 @@ extension GenericUnixToolchain {
+       // just using `clang` and avoid a dependency on the C++ runtime.
+       let clangTool: Tool =
+         parsedOptions.hasArgument(.enableExperimentalCxxInterop) ? .clangxx : .clang
+-      var clangPath = try getToolPath(clangTool)
+
+      // For Nix, prefer linking using the wrapped system clang, instead of using
+      // the unwrapped clang packaged with swift. The latter is unable to link, but
+      // we still want to use it for other purposes (clang importer).
+      var clangPath: AbsolutePath
+      let env = ProcessInfo.processInfo.environment
+      if let nixCC = env["NIX_CC"],
+         let binPath = try? AbsolutePath(validating: "\(nixCC)/bin"),
+         let tool = lookupExecutablePath(filename: parsedOptions.hasArgument(.enableExperimentalCxxInterop)
+                                                        ? "clang++" : "clang",
+                                         searchPaths: [binPath]) {
+        clangPath = tool
+      } else {
+      clangPath = try getToolPath(clangTool)
+       if let toolsDirPath = parsedOptions.getLastArgument(.toolsDirectory) {
+         // FIXME: What if this isn't an absolute path?
+         let toolsDir = try AbsolutePath(validating: toolsDirPath.asSingle)
+@@ -132,6 +146,7 @@ extension GenericUnixToolchain {
+         commandLine.appendFlag("-B")
+         commandLine.appendPath(toolsDir)
+       }
+      } // nixCC
+ 
+       // Executables on Linux get -pie
+       if targetTriple.os == .linux && linkerOutputType == .executable {
--- a/pkgs/development/compilers/swift/swift-driver/patches/nix-resource-root.patch
+++ b/pkgs/development/compilers/swift/swift-driver/patches/nix-resource-root.patch
@ -0,0 +1,28 @@
+Swift normally looks for the Clang resource dir in a subdir/symlink of its own
+resource dir. We provide a symlink to the Swift build-time Clang as a default
+there, but we also here patch a check to try locate it via NIX_CC.
+
+--- a/Sources/SwiftDriver/Jobs/Toolchain+LinkerSupport.swift
+++ b/Sources/SwiftDriver/Jobs/Toolchain+LinkerSupport.swift
+@@ -9,6 +9,7 @@
+ // See https://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
+ //
+ //===----------------------------------------------------------------------===//
+import Foundation
+ import TSCBasic
+ import SwiftOptions
+ 
+@@ -24,6 +25,13 @@ extension Toolchain {
+     for targetInfo: FrontendTargetInfo,
+     parsedOptions: inout ParsedOptions
+   ) throws -> VirtualPath {
+    let env = ProcessInfo.processInfo.environment
+    if let nixCC = env["NIX_CC"] {
+      return try VirtualPath(path: nixCC)
+        .appending(components: "resource-root", "lib",
+                   targetInfo.target.triple.platformName(conflatingDarwin: true)!)
+    }
+
+     return VirtualPath.lookup(targetInfo.runtimeResourcePath.path)
+       .appending(components: "clang", "lib",
+                  targetInfo.target.triple.platformName(conflatingDarwin: true)!)
--- a/pkgs/development/compilers/swift/swift-driver/patches/prevent-sdk-dirs-warnings.patch
+++ b/pkgs/development/compilers/swift/swift-driver/patches/prevent-sdk-dirs-warnings.patch
@ -0,0 +1,16 @@
+Prevents a user-visible warning on every compilation:
+
+  ld: warning: directory not found for option '-L.../MacOSX11.0.sdk/usr/lib/swift'
+
+--- a/Sources/SwiftDriver/Jobs/Toolchain+LinkerSupport.swift
+++ b/Sources/SwiftDriver/Jobs/Toolchain+LinkerSupport.swift
+@@ -50,7 +50,9 @@ extension Toolchain {
+         result.append(sdkPath.appending(components: "System", "iOSSupport", "usr", "lib", "swift"))
+       }
+ 
+      if sdkPath.absolutePath?.pathString.starts(with: "@storeDir@") == false {
+       result.append(sdkPath.appending(components: "usr", "lib", "swift"))
+      }
+     }
+ 
+     return result
--- a/pkgs/development/compilers/swift/swiftpm/cmake-glue.nix
+++ b/pkgs/development/compilers/swift/swiftpm/cmake-glue.nix
@ -0,0 +1,90 @@
+# SwiftPM dependencies are normally not installed using CMake, and only provide
+# CMake modules to link them together in a build tree. We have separate
+# derivations, so need a real install step. Here we provide our own minimal
+# CMake modules to install along with the build products.
+{ lib, stdenv, swift }:
+let
+
+  inherit (stdenv.hostPlatform) extensions;
+
+  # This file exports shell snippets for use in postInstall.
+  mkInstallScript = module: template: ''
+    mkdir -p $out/lib/cmake/${module}
+    (
+      export staticLibExt="${extensions.staticLibrary}"
+      export sharedLibExt="${extensions.sharedLibrary}"
+      export swiftOs="${swift.swiftOs}"
+      substituteAll \
+        ${builtins.toFile "${module}Config.cmake" template} \
+        $out/lib/cmake/${module}/${module}Config.cmake
+    )
+  '';
+
+in lib.mapAttrs mkInstallScript {
+  SwiftSystem = ''
+    add_library(SwiftSystem::SystemPackage STATIC IMPORTED)
+    set_property(TARGET SwiftSystem::SystemPackage PROPERTY IMPORTED_LOCATION "@out@/lib/swift_static/@swiftOs@/libSystemPackage@staticLibExt@")
+  '';
+
+  SwiftCollections = ''
+    add_library(SwiftCollections::Collections STATIC IMPORTED)
+    set_property(TARGET SwiftCollections::Collections PROPERTY IMPORTED_LOCATION "@out@/lib/swift_static/@swiftOs@/libCollections@staticLibExt@")
+
+    add_library(SwiftCollections::DequeModule STATIC IMPORTED)
+    set_property(TARGET SwiftCollections::DequeModule PROPERTY IMPORTED_LOCATION "@out@/lib/swift_static/@swiftOs@/libDequeModule@staticLibExt@")
+
+    add_library(SwiftCollections::OrderedCollections STATIC IMPORTED)
+    set_property(TARGET SwiftCollections::OrderedCollections PROPERTY IMPORTED_LOCATION "@out@/lib/swift_static/@swiftOs@/libOrderedCollections@staticLibExt@")
+  '';
+
+  TSC = ''
+    add_library(TSCLibc SHARED IMPORTED)
+    set_property(TARGET TSCLibc PROPERTY IMPORTED_LOCATION "@out@/lib/libTSCLibc@sharedLibExt@")
+
+    add_library(TSCBasic SHARED IMPORTED)
+    set_property(TARGET TSCBasic PROPERTY IMPORTED_LOCATION "@out@/lib/libTSCBasic@sharedLibExt@")
+
+    add_library(TSCUtility SHARED IMPORTED)
+    set_property(TARGET TSCUtility PROPERTY IMPORTED_LOCATION "@out@/lib/libTSCUtility@sharedLibExt@")
+  '';
+
+  ArgumentParser = ''
+    add_library(ArgumentParser SHARED IMPORTED)
+    set_property(TARGET ArgumentParser PROPERTY IMPORTED_LOCATION "@out@/lib/swift/@swiftOs@/libArgumentParser@sharedLibExt@")
+
+    add_library(ArgumentParserToolInfo SHARED IMPORTED)
+    set_property(TARGET ArgumentParserToolInfo PROPERTY IMPORTED_LOCATION "@out@/lib/swift/@swiftOs@/libArgumentParserToolInfo@sharedLibExt@")
+  '';
+
+  Yams = ''
+    add_library(CYaml SHARED IMPORTED)
+    set_property(TARGET CYaml PROPERTY IMPORTED_LOCATION "@out@/lib/libCYaml@sharedLibExt@")
+
+    add_library(Yams SHARED IMPORTED)
+    set_property(TARGET Yams PROPERTY IMPORTED_LOCATION "@out@/lib/swift/@swiftOs@/libYams@sharedLibExt@")
+  '';
+
+  LLBuild = ''
+    add_library(libllbuild SHARED IMPORTED)
+    set_property(TARGET libllbuild PROPERTY IMPORTED_LOCATION "@out@/lib/libllbuild@sharedLibExt@")
+
+    add_library(llbuildSwift SHARED IMPORTED)
+    set_property(TARGET llbuildSwift PROPERTY IMPORTED_LOCATION "@out@/lib/swift/pm/llbuild/libllbuildSwift@sharedLibExt@")
+  '';
+
+  SwiftDriver = ''
+    add_library(SwiftDriver SHARED IMPORTED)
+    set_property(TARGET SwiftDriver PROPERTY IMPORTED_LOCATION "@out@/lib/libSwiftDriver@sharedLibExt@")
+
+    add_library(SwiftDriverExecution SHARED IMPORTED)
+    set_property(TARGET SwiftDriverExecution PROPERTY IMPORTED_LOCATION "@out@/lib/libSwiftDriverExecution@sharedLibExt@")
+
+    add_library(SwiftOptions SHARED IMPORTED)
+    set_property(TARGET SwiftOptions PROPERTY IMPORTED_LOCATION "@out@/lib/libSwiftOptions@sharedLibExt@")
+  '';
+
+  SwiftCrypto = ''
+    add_library(Crypto SHARED IMPORTED)
+    set_property(TARGET Crypto PROPERTY IMPORTED_LOCATION "@out@/lib/swift/@swiftOs@/libCrypto@sharedLibExt@")
+  '';
+}
--- a/pkgs/development/compilers/swift/swiftpm/default.nix
+++ b/pkgs/development/compilers/swift/swiftpm/default.nix
@ -0,0 +1,418 @@
+{ lib
+, stdenv
+, callPackage
+, cmake
+, ninja
+, git
+, swift
+, swiftpm2nix
+, Foundation
+, XCTest
+, sqlite
+, ncurses
+, substituteAll
+, runCommandLocal
+, makeWrapper
+, DarwinTools # sw_vers
+, cctools # vtool
+, xcbuild
+, CryptoKit
+, LocalAuthentication
+}:
+
+let
+
+  inherit (swift) swiftOs swiftModuleSubdir swiftStaticModuleSubdir;
+  sharedLibraryExt = stdenv.hostPlatform.extensions.sharedLibrary;
+
+  sources = callPackage ../sources.nix { };
+  generated = swiftpm2nix.helpers ./generated;
+  cmakeGlue = callPackage ./cmake-glue.nix { };
+
+  # Common attributes for the bootstrap swiftpm and the final swiftpm.
+  commonAttrs = {
+    inherit (sources) version;
+    src = sources.swift-package-manager;
+    nativeBuildInputs = [ makeWrapper ];
+    # Required at run-time for the host platform to build package manifests.
+    propagatedBuildInputs = [ Foundation ];
+    patches = [
+      ./patches/cmake-disable-rpath.patch
+      ./patches/disable-sandbox.patch
+      ./patches/fix-clang-cxx.patch
+      (substituteAll {
+        src = ./patches/disable-xctest.patch;
+        inherit (builtins) storeDir;
+      })
+      (substituteAll {
+        src = ./patches/fix-stdlib-path.patch;
+        inherit (builtins) storeDir;
+        swiftLib = swift.swift.lib;
+      })
+    ];
+    postPatch = ''
+      # The location of xcrun is hardcoded. We need PATH lookup instead.
+      find Sources -name '*.swift' | xargs sed -i -e 's|/usr/bin/xcrun|xcrun|g'
+
+      # Patch the location where swiftpm looks for its API modules.
+      substituteInPlace Sources/PackageModel/UserToolchain.swift \
+        --replace \
+          'librariesPath = applicationPath.parentDirectory' \
+          "librariesPath = AbsolutePath(\"$out\")"
+    '';
+  };
+
+  # Tools invoked by swiftpm at run-time.
+  runtimeDeps = [ git ]
+    ++ lib.optionals stdenv.isDarwin [
+      xcbuild.xcrun
+      # vtool is used to determine a minimum deployment target. This is part of
+      # cctools, but adding that as a build input puts an unwrapped linker in
+      # PATH, and breaks builds. This small derivation exposes just vtool.
+      (runCommandLocal "vtool" { } ''
+        mkdir -p $out/bin
+        ln -s ${cctools}/bin/vtool $out/bin/vtool
+      '')
+    ];
+
+  # Common attributes for the bootstrap derivations.
+  mkBootstrapDerivation = attrs: stdenv.mkDerivation (attrs // {
+    nativeBuildInputs = (attrs.nativeBuildInputs or [ ])
+      ++ [ cmake ninja swift ]
+      ++ lib.optionals stdenv.isDarwin [ DarwinTools ];
+
+    buildInputs = (attrs.buildInputs or [ ])
+      ++ [ Foundation ];
+
+    postPatch = (attrs.postPatch or "")
+      + lib.optionalString stdenv.isDarwin ''
+        # On Darwin only, Swift uses arm64 as cpu arch.
+        if [ -e cmake/modules/SwiftSupport.cmake ]; then
+          substituteInPlace cmake/modules/SwiftSupport.cmake \
+            --replace '"aarch64" PARENT_SCOPE' '"arm64" PARENT_SCOPE'
+        fi
+      '';
+
+    preConfigure = (attrs.preConfigure or "")
+      + ''
+        # Builds often don't set a target, and our default minimum macOS deployment
+        # target on x86_64-darwin is too low. Harmless on non-Darwin.
+        export MACOSX_DEPLOYMENT_TARGET=10.15.4
+      '';
+
+    postInstall = (attrs.postInstall or "")
+      + lib.optionalString stdenv.isDarwin ''
+        # The install name of libraries is incorrectly set to lib/ (via our
+        # CMake setup hook) instead of lib/swift/. This'd be easily fixed by
+        # fixDarwinDylibNames, but some builds create libraries that reference
+        # eachother, and we also have to fix those references.
+        dylibs="$(find $out/lib/swift* -name '*.dylib')"
+        changes=""
+        for dylib in $dylibs; do
+          changes+=" -change $(otool -D $dylib | tail -n 1) $dylib"
+        done
+        for dylib in $dylibs; do
+          install_name_tool -id $dylib $changes $dylib
+        done
+      '';
+
+    cmakeFlags = (attrs.cmakeFlags or [ ])
+      ++ [
+        # Some builds link to libraries within the same build. Make sure these
+        # create references to $out. None of our builds run their own products,
+        # so we don't have to account for that scenario.
+        "-DCMAKE_BUILD_WITH_INSTALL_NAME_DIR=ON"
+      ];
+  });
+
+  # On Darwin, we only want ncurses in the linker search path, because headers
+  # are part of libsystem. Adding its headers to the search path causes strange
+  # mixing and errors.
+  # TODO: Find a better way to prevent this conflict.
+  ncursesInput = if stdenv.isDarwin then ncurses.out else ncurses;
+
+  # Derivations for bootstrapping dependencies using CMake.
+  # This is based on the `swiftpm/Utilities/bootstrap` script.
+  #
+  # Some of the installation steps here are a bit hacky, because it seems like
+  # these packages were not really meant to be installed using CMake. The
+  # regular swiftpm bootstrap simply refers to the source and build
+  # directories. The advantage of separate builds is that we can more easily
+  # link libs together using existing Nixpkgs infra.
+  #
+  # In the end, we don't expose these derivations, and they only exist during
+  # the bootstrap phase. The final swiftpm derivation does not depend on them.
+
+  swift-system = mkBootstrapDerivation {
+    name = "swift-system";
+    src = generated.sources.swift-system;
+
+    postInstall = cmakeGlue.SwiftSystem
+      + lib.optionalString (!stdenv.isDarwin) ''
+        # The cmake rules apparently only use the Darwin install convention.
+        # Fix up the installation so the module can be found on non-Darwin.
+        mkdir -p $out/${swiftStaticModuleSubdir}
+        mv $out/lib/swift_static/${swiftOs}/*.swiftmodule $out/${swiftStaticModuleSubdir}/
+      '';
+  };
+
+  swift-collections = mkBootstrapDerivation {
+    name = "swift-collections";
+    src = generated.sources.swift-collections;
+
+    postPatch = ''
+      # Only builds static libs on Linux, but this installation difference is a
+      # hassle. Because this installation is temporary for the bootstrap, may
+      # as well build static libs everywhere.
+      sed -i -e '/BUILD_SHARED_LIBS/d' CMakeLists.txt
+    '';
+
+    postInstall = cmakeGlue.SwiftCollections
+      + lib.optionalString (!stdenv.isDarwin) ''
+        # The cmake rules apparently only use the Darwin install convention.
+        # Fix up the installation so the module can be found on non-Darwin.
+        mkdir -p $out/${swiftStaticModuleSubdir}
+        mv $out/lib/swift_static/${swiftOs}/*.swiftmodule $out/${swiftStaticModuleSubdir}/
+      '';
+  };
+
+  swift-tools-support-core = mkBootstrapDerivation {
+    name = "swift-tools-support-core";
+    src = generated.sources.swift-tools-support-core;
+
+    buildInputs = [
+      swift-system
+      sqlite
+    ];
+
+    postInstall = cmakeGlue.TSC + ''
+      # Swift modules are not installed.
+      mkdir -p $out/${swiftModuleSubdir}
+      cp swift/*.swift{module,doc} $out/${swiftModuleSubdir}/
+
+      # Static libs are not installed.
+      cp lib/*.a $out/lib/
+
+      # Headers are not installed.
+      mkdir -p $out/include
+      cp -r ../Sources/TSCclibc/include $out/include/TSC
+    '';
+  };
+
+  swift-argument-parser = mkBootstrapDerivation {
+    name = "swift-argument-parser";
+    src = generated.sources.swift-argument-parser;
+
+    buildInputs = [ ncursesInput sqlite ];
+
+    cmakeFlags = [
+      "-DBUILD_TESTING=NO"
+      "-DBUILD_EXAMPLES=NO"
+    ];
+
+    postInstall = cmakeGlue.ArgumentParser
+      + lib.optionalString stdenv.isLinux ''
+        # Fix rpath so ArgumentParserToolInfo can be found.
+        patchelf --add-rpath "$out/lib/swift/${swiftOs}" \
+          $out/lib/swift/${swiftOs}/libArgumentParser.so
+      '';
+  };
+
+  Yams = mkBootstrapDerivation {
+    name = "Yams";
+    src = generated.sources.Yams;
+
+    # Conflicts with BUILD file on case-insensitive filesystems.
+    cmakeBuildDir = "_build";
+
+    postInstall = cmakeGlue.Yams;
+  };
+
+  llbuild = mkBootstrapDerivation {
+    name = "llbuild";
+    src = generated.sources.swift-llbuild;
+
+    nativeBuildInputs = lib.optional stdenv.isDarwin xcbuild;
+    buildInputs = [ ncursesInput sqlite ];
+
+    patches = [
+      ./patches/llbuild-cmake-disable-rpath.patch
+    ];
+
+    postPatch = ''
+      # Substitute ncurses for curses.
+      find . -name CMakeLists.txt | xargs sed -i -e 's/curses/ncurses/'
+
+      # Use absolute install names instead of rpath.
+      substituteInPlace \
+        products/libllbuild/CMakeLists.txt \
+        products/llbuildSwift/CMakeLists.txt \
+        --replace '@rpath' "$out/lib"
+
+      # This subdirectory is enabled for Darwin only, but requires ObjC XCTest
+      # (and only Swift XCTest is open source).
+      substituteInPlace perftests/CMakeLists.txt \
+        --replace 'add_subdirectory(Xcode/' '#add_subdirectory(Xcode/'
+    '';
+
+    cmakeFlags = [
+      "-DLLBUILD_SUPPORT_BINDINGS=Swift"
+    ];
+
+    postInstall = cmakeGlue.LLBuild + ''
+      # Install module map.
+      cp ../products/libllbuild/include/module.modulemap $out/include
+
+      # Swift modules are not installed.
+      mkdir -p $out/${swiftModuleSubdir}
+      cp products/llbuildSwift/*.swift{module,doc} $out/${swiftModuleSubdir}/
+    '';
+  };
+
+  swift-driver = mkBootstrapDerivation {
+    name = "swift-driver";
+    src = generated.sources.swift-driver;
+
+    buildInputs = [
+      Yams
+      llbuild
+      swift-system
+      swift-argument-parser
+      swift-tools-support-core
+    ];
+
+    postInstall = cmakeGlue.SwiftDriver + ''
+      # Swift modules are not installed.
+      mkdir -p $out/${swiftModuleSubdir}
+      cp swift/*.swift{module,doc} $out/${swiftModuleSubdir}/
+    '';
+  };
+
+  swift-crypto = mkBootstrapDerivation {
+    name = "swift-crypto";
+    src = generated.sources.swift-crypto;
+
+    postPatch = ''
+      substituteInPlace CMakeLists.txt \
+        --replace /usr/bin/ar $NIX_CC/bin/ar
+    '';
+
+    postInstall = cmakeGlue.SwiftCrypto + ''
+      # Static libs are not installed.
+      cp lib/*.a $out/lib/
+
+      # Headers are not installed.
+      cp -r ../Sources/CCryptoBoringSSL/include $out/include
+    '';
+  };
+
+  # Build a bootrapping swiftpm using CMake.
+  swiftpm-bootstrap = mkBootstrapDerivation (commonAttrs // {
+    pname = "swiftpm-bootstrap";
+
+    buildInputs = [
+      llbuild
+      swift-argument-parser
+      swift-collections
+      swift-crypto
+      swift-driver
+      swift-system
+      swift-tools-support-core
+    ];
+
+    cmakeFlags = [
+      "-DUSE_CMAKE_INSTALL=ON"
+    ];
+
+    postInstall = ''
+      for program in $out/bin/swift-*; do
+        wrapProgram $program --prefix PATH : ${lib.makeBinPath runtimeDeps}
+      done
+    '';
+  });
+
+# Build the final swiftpm with the bootstrapping swiftpm.
+in stdenv.mkDerivation (commonAttrs // {
+  pname = "swiftpm";
+
+  nativeBuildInputs = commonAttrs.nativeBuildInputs ++ [
+    swift
+    swiftpm-bootstrap
+  ];
+  buildInputs = [
+    ncursesInput
+    sqlite
+    XCTest
+  ]
+    ++ lib.optionals stdenv.isDarwin [
+      CryptoKit
+      LocalAuthentication
+    ];
+
+  configurePhase = generated.configure + ''
+    # Functionality provided by Xcode XCTest, but not available in
+    # swift-corelibs-xctest.
+    swiftpmMakeMutable swift-tools-support-core
+    substituteInPlace .build/checkouts/swift-tools-support-core/Sources/TSCTestSupport/XCTestCasePerf.swift \
+      --replace 'canImport(Darwin)' 'false'
+
+    # Prevent a warning about SDK directories we don't have.
+    swiftpmMakeMutable swift-driver
+    patch -p1 -d .build/checkouts/swift-driver -i ${substituteAll {
+      src = ../swift-driver/patches/prevent-sdk-dirs-warnings.patch;
+      inherit (builtins) storeDir;
+    }}
+  '';
+
+  buildPhase = ''
+    # Required to link with swift-corelibs-xctest on Darwin.
+    export SWIFTTSC_MACOS_DEPLOYMENT_TARGET=10.12
+
+    TERM=dumb swift-build -c release
+  '';
+
+  # TODO: Tests depend on indexstore-db being provided by an existing Swift
+  # toolchain. (ie. looks for `../lib/libIndexStore.so` relative to swiftc.
+  #doCheck = true;
+  #checkPhase = ''
+  #  TERM=dumb swift-test -c release
+  #'';
+
+  # The following is dervied from Utilities/bootstrap, see install_swiftpm.
+  installPhase = ''
+    binPath="$(swift-build --show-bin-path -c release)"
+
+    mkdir -p $out/bin $out/lib/swift
+
+    cp $binPath/swift-package $out/bin/
+    wrapProgram $out/bin/swift-package \
+      --prefix PATH : ${lib.makeBinPath runtimeDeps}
+    for tool in swift-build swift-test swift-run swift-package-collection; do
+      ln -s $out/bin/swift-package $out/bin/$tool
+    done
+
+    installSwiftpmModule() {
+      mkdir -p $out/lib/swift/pm/$2
+      cp $binPath/lib$1${sharedLibraryExt} $out/lib/swift/pm/$2/
+
+      if [[ -f $binPath/$1.swiftinterface ]]; then
+        cp $binPath/$1.swiftinterface $out/lib/swift/pm/$2/
+      else
+        cp -r $binPath/$1.swiftmodule $out/lib/swift/pm/$2/
+      fi
+      cp $binPath/$1.swiftdoc $out/lib/swift/pm/$2/
+    }
+    installSwiftpmModule PackageDescription ManifestAPI
+    installSwiftpmModule PackagePlugin PluginAPI
+  '';
+
+  setupHook = ./setup-hook.sh;
+
+  meta = {
+    description = "The Package Manager for the Swift Programming Language";
+    homepage = "https://github.com/apple/swift-package-manager";
+    platforms = with lib.platforms; linux ++ darwin;
+    license = lib.licenses.asl20;
+    maintainers = with lib.maintainers; [ dtzWill trepetti dduan trundle stephank ];
+  };
+})
--- a/pkgs/development/compilers/swift/swiftpm/generated/default.nix
+++ b/pkgs/development/compilers/swift/swiftpm/generated/default.nix
@ -0,0 +1,14 @@
+# This file was generated by swiftpm2nix.
+{
+  workspaceStateFile = ./workspace-state.json;
+  hashes = {
+    "swift-argument-parser" = "1jph9w7lk9nr20fsv2c8p4hisx3dda817fh7pybd0r0j1jwa9nmw";
+    "swift-collections" = "0l0pv16zil3n7fac7mdf5qxklxr5rwiig5bixgca1ybq7arlnv7i";
+    "swift-crypto" = "020b8q4ss2k7a65r5dgh59z40i6sn7ij1allxkh8c8a9d0jzn313";
+    "swift-driver" = "1lcb5wqragc74nd0fjnk47lyph9hs0i9cps1mplvp2i91yzjqk05";
+    "swift-llbuild" = "07zbp2dyfqd1bnyg7snpr9brn40jf22ivly5v10mql3hrg76a18h";
+    "swift-system" = "0402hkx2q2dv27gccnn8ma79ngvwiwzkhcv4zlcdldmy6cgi0px7";
+    "swift-tools-support-core" = "1vabl1z5sm2lrd75f5c781rkrq0liinpjvnrjr6i6r8cqrp0q5jb";
+    "Yams" = "1893y13sis2aimi1a5kgkczbf06z4yig054xb565yg2xm13srb45";
+  };
+}
--- a/Show more
+++ b/Show more