diff --git a/lib/customisation.nix b/lib/customisation.nix
index a9281b1ab69..5c66169f215 100644
--- a/lib/customisation.nix
+++ b/lib/customisation.nix
@@ -279,7 +279,15 @@ rec {
 
   /* Like the above, but aims to support cross compilation. It's still ugly, but
      hopefully it helps a little bit. */
-  makeScopeWithSplicing = splicePackages: newScope: otherSplices: keep: extra: f:
+  makeScopeWithSplicing =
+    { splicePackages
+    , newScope
+    }:
+    { otherSplices
+    , keep ? (_self: {})
+    , extra ? (_spliced0: {})
+    , f
+    }:
     let
       spliced0 = splicePackages {
         pkgsBuildBuild = otherSplices.selfBuildBuild;
@@ -295,13 +303,11 @@ rec {
         callPackage = newScope spliced; # == self.newScope {};
         # N.B. the other stages of the package set spliced in are *not*
         # overridden.
-        overrideScope = g: makeScopeWithSplicing
-          splicePackages
-          newScope
-          otherSplices
-          keep
-          extra
-          (lib.fixedPoints.extends g f);
+        overrideScope = g: (makeScopeWithSplicing
+          { inherit splicePackages newScope; }
+          { inherit otherSplices keep extra;
+            f = lib.fixedPoints.extends g f;
+          });
         packages = f;
       };
     in self;
diff --git a/pkgs/desktops/xfce/default.nix b/pkgs/desktops/xfce/default.nix
index 5dc21338a72..1593deca9c3 100644
--- a/pkgs/desktops/xfce/default.nix
+++ b/pkgs/desktops/xfce/default.nix
@@ -5,16 +5,9 @@
 , makeScopeWithSplicing
 }:
 
-let
-  keep = _self: { };
-  extra = _spliced0: { };
-
-in
-makeScopeWithSplicing
-  (generateSplicesForMkScope "xfce")
-  keep
-  extra
-  (self:
+makeScopeWithSplicing {
+  otherSplices = generateSplicesForMkScope "xfce";
+  f = (self:
     let
       inherit (self) callPackage;
     in
@@ -177,4 +170,5 @@ makeScopeWithSplicing
       thunar-bare = self.thunar.override { thunarPlugins = [ ]; }; # added 2019-11-04
 
       xfce4-hardware-monitor-plugin = throw "xfce.xfce4-hardware-monitor-plugin has been removed: abandoned by upstream and does not build"; # added 2023-01-15
-    })
+    });
+}
diff --git a/pkgs/development/interpreters/lua-5/default.nix b/pkgs/development/interpreters/lua-5/default.nix
index f4c622515d7..918c3375b0d 100644
--- a/pkgs/development/interpreters/lua-5/default.nix
+++ b/pkgs/development/interpreters/lua-5/default.nix
@@ -39,18 +39,15 @@ let
             selfHostHost = luaOnHostForHost.pkgs;
             selfTargetTarget = luaOnTargetForTarget.pkgs or {};
           };
-          keep = self: { };
-          extra = spliced0: {};
           extensions = lib.composeManyExtensions [
             generatedPackages
             overriddenPackages
             overrides
           ];
-        in makeScopeWithSplicing
-          otherSplices
-          keep
-          extra
-          (lib.extends extensions luaPackagesFun))
+        in makeScopeWithSplicing {
+          inherit otherSplices;
+          f = lib.extends extensions luaPackagesFun;
+        })
         {
           overrides = packageOverrides;
           lua = self;
diff --git a/pkgs/development/interpreters/perl/default.nix b/pkgs/development/interpreters/perl/default.nix
index 3c57d8a2b69..faf9e26cff7 100644
--- a/pkgs/development/interpreters/perl/default.nix
+++ b/pkgs/development/interpreters/perl/default.nix
@@ -34,13 +34,10 @@ let
             selfHostHost = perlOnHostForHost.pkgs;
             selfTargetTarget = perlOnTargetForTarget.pkgs or {};
           };
-          keep = self: { };
-          extra = spliced0: {};
-        in makeScopeWithSplicing
-          otherSplices
-          keep
-          extra
-          perlPackagesFun)
+        in makeScopeWithSplicing {
+          inherit otherSplices;
+          f = perlPackagesFun;
+        })
         {
           perl = self;
         };
diff --git a/pkgs/development/interpreters/python/passthrufun.nix b/pkgs/development/interpreters/python/passthrufun.nix
index aa63f354e08..91ff48d9571 100644
--- a/pkgs/development/interpreters/python/passthrufun.nix
+++ b/pkgs/development/interpreters/python/passthrufun.nix
@@ -48,7 +48,6 @@
       };
       hooks = import ./hooks/default.nix;
       keep = lib.extends hooks pythonPackagesFun;
-      extra = _: {};
       optionalExtensions = cond: as: lib.optionals cond as;
       pythonExtension = import ../../../top-level/python-packages.nix;
       python2Extension = import ../../../top-level/python2-packages.nix;
@@ -60,12 +59,10 @@
         overrides
       ]);
       aliases = self: super: lib.optionalAttrs config.allowAliases (import ../../../top-level/python-aliases.nix lib self super);
-    in makeScopeWithSplicing
-      otherSplices
-      keep
-      extra
-      (lib.extends (lib.composeExtensions aliases extensions) keep))
-    {
+    in makeScopeWithSplicing {
+      inherit otherSplices keep;
+      f = lib.extends (lib.composeExtensions aliases extensions) keep;
+    }) {
       overrides = packageOverrides;
       python = self;
     });
diff --git a/pkgs/development/libraries/qt-5/5.15/default.nix b/pkgs/development/libraries/qt-5/5.15/default.nix
index 5f829009038..289af985e04 100644
--- a/pkgs/development/libraries/qt-5/5.15/default.nix
+++ b/pkgs/development/libraries/qt-5/5.15/default.nix
@@ -334,4 +334,7 @@ let
       overrideScope' = lib.warn "qt5 now uses makeScopeWithSplicing which does not have \"overrideScope'\", use \"overrideScope\"." self.overrideScope;
     };
 
-in makeScopeWithSplicing (generateSplicesForMkScope "qt5") (_: {}) (_: {}) addPackages
+in makeScopeWithSplicing {
+  otherSplices = generateSplicesForMkScope "qt5";
+  f = addPackages;
+}
diff --git a/pkgs/games/steam/default.nix b/pkgs/games/steam/default.nix
index 370f22268a9..487175970cd 100644
--- a/pkgs/games/steam/default.nix
+++ b/pkgs/games/steam/default.nix
@@ -32,6 +32,7 @@ let
 
     steamcmd = callPackage ./steamcmd.nix { };
   };
-  keep = self: { };
-  extra = spliced0: { };
-in makeScopeWithSplicing (generateSplicesForMkScope "steamPackages") keep extra steamPackagesFun
+in makeScopeWithSplicing {
+  otherSplices = generateSplicesForMkScope "steamPackages";
+  f = steamPackagesFun;
+}
diff --git a/pkgs/os-specific/bsd/freebsd/default.nix b/pkgs/os-specific/bsd/freebsd/default.nix
index 136c9721c6b..e7541125436 100644
--- a/pkgs/os-specific/bsd/freebsd/default.nix
+++ b/pkgs/os-specific/bsd/freebsd/default.nix
@@ -66,11 +66,9 @@ let
     done
   '';
 
-in makeScopeWithSplicing
-  (generateSplicesForMkScope "freebsd")
-  (_: {})
-  (_: {})
-  (self: let
+in makeScopeWithSplicing {
+  otherSplices = generateSplicesForMkScope "freebsd";
+  f = (self: let
     inherit (self) mkDerivation;
   in {
   inherit freebsdSrc;
@@ -898,4 +896,5 @@ in makeScopeWithSplicing
     '';
   });
 
-})
+});
+}
diff --git a/pkgs/os-specific/bsd/netbsd/default.nix b/pkgs/os-specific/bsd/netbsd/default.nix
index 6bf884d3828..f12f5d2b18e 100644
--- a/pkgs/os-specific/bsd/netbsd/default.nix
+++ b/pkgs/os-specific/bsd/netbsd/default.nix
@@ -26,11 +26,9 @@ let
       else "no"}"
   ];
 
-in makeScopeWithSplicing
-  (generateSplicesForMkScope "netbsd")
-  (_: {})
-  (_: {})
-  (self: let
+in makeScopeWithSplicing {
+  otherSplices = generateSplicesForMkScope "netbsd";
+  f = (self: let
     inherit (self) mkDerivation;
   in {
 
@@ -1011,4 +1009,5 @@ in makeScopeWithSplicing
   # END MISCELLANEOUS
   #
 
-})
+});
+}
diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index 7ffe2f23417..7e640ccc9ec 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -27121,9 +27121,6 @@ with pkgs;
   };
 
   xorg = let
-    keep = _self: { };
-    extra = _spliced0: { };
-
     # Use `lib.callPackageWith __splicedPackages` rather than plain `callPackage`
     # so as not to have the newly bound xorg items already in scope,  which would
     # have created a cycle.
@@ -27138,11 +27135,10 @@ with pkgs;
 
     generatedPackages = lib.callPackageWith __splicedPackages ../servers/x11/xorg/default.nix { };
 
-    xorgPackages = makeScopeWithSplicing
-      (generateSplicesForMkScope "xorg")
-      keep
-      extra
-      (lib.extends overrides generatedPackages);
+    xorgPackages = makeScopeWithSplicing {
+      otherSplices = generateSplicesForMkScope "xorg";
+      f = lib.extends overrides generatedPackages;
+    };
 
   in recurseIntoAttrs xorgPackages;
 
diff --git a/pkgs/top-level/darwin-packages.nix b/pkgs/top-level/darwin-packages.nix
index ef4240955b9..c30d1c1c192 100644
--- a/pkgs/top-level/darwin-packages.nix
+++ b/pkgs/top-level/darwin-packages.nix
@@ -15,7 +15,10 @@ let
                                         (stdenv.targetPlatform.config + "-");
 in
 
-makeScopeWithSplicing (generateSplicesForMkScope "darwin") (_: {}) (spliced: spliced.apple_sdk.frameworks) (self: let
+makeScopeWithSplicing {
+  otherSplices = generateSplicesForMkScope "darwin";
+  extra = spliced: spliced.apple_sdk.frameworks;
+  f = (self: let
   inherit (self) mkDerivation callPackage;
 
   # Must use pkgs.callPackage to avoid infinite recursion.
@@ -251,4 +254,5 @@ impure-cmds // appleSourcePackages // chooseLibs // {
 
 } // lib.optionalAttrs config.allowAliases {
   builder = throw "'darwin.builder' has been changed and renamed to 'darwin.linux-builder'. The default ssh port is now 31022. Please update your configuration or override the port back to 22. See https://nixos.org/manual/nixpkgs/unstable/#sec-darwin-builder"; # added 2023-07-06
-})
+});
+}
diff --git a/pkgs/top-level/splice.nix b/pkgs/top-level/splice.nix
index 0a138947e8d..57cedb12a2f 100644
--- a/pkgs/top-level/splice.nix
+++ b/pkgs/top-level/splice.nix
@@ -144,7 +144,7 @@ in
   newScope = extra: lib.callPackageWith (splicedPackagesWithXorg // extra);
 
   # prefill 2 fields of the function for convenience
-  makeScopeWithSplicing = lib.makeScopeWithSplicing splicePackages pkgs.newScope;
+  makeScopeWithSplicing = lib.makeScopeWithSplicing { inherit splicePackages; inherit (pkgs) newScope; };
 
   # generate 'otherSplices' for 'makeScopeWithSplicing'
   generateSplicesForMkScope = attr: