diff --git a/nixos/doc/manual/from_md/release-notes/rl-2205.section.xml b/nixos/doc/manual/from_md/release-notes/rl-2205.section.xml
index 82965ff1875..ea6c11b25d0 100644
--- a/nixos/doc/manual/from_md/release-notes/rl-2205.section.xml
+++ b/nixos/doc/manual/from_md/release-notes/rl-2205.section.xml
@@ -109,6 +109,13 @@
           removed due to it being an outdated version.
         </para>
       </listitem>
+      <listitem>
+        <para>
+          The MoinMoin wiki engine
+          (<literal>services.moinmoin</literal>) has been removed,
+          because Python 2 is being retired from nixpkgs.
+        </para>
+      </listitem>
       <listitem>
         <para>
           The <literal>wafHook</literal> hook now honors
diff --git a/nixos/doc/manual/release-notes/rl-2205.section.md b/nixos/doc/manual/release-notes/rl-2205.section.md
index be9b57d1afe..3a56acf9fa9 100644
--- a/nixos/doc/manual/release-notes/rl-2205.section.md
+++ b/nixos/doc/manual/release-notes/rl-2205.section.md
@@ -43,6 +43,8 @@ In addition to numerous new and upgraded packages, this release has the followin
 
 - `services.kubernetes.addons.dashboard` was removed due to it being an outdated version.
 
+- The MoinMoin wiki engine (`services.moinmoin`) has been removed, because Python 2 is being retired from nixpkgs.
+
 - The `wafHook` hook now honors `NIX_BUILD_CORES` when `enableParallelBuilding` is not set explicitly. Packages can restore the old behaviour by setting `enableParallelBuilding=false`.
 
 - `pkgs.claws-mail-gtk2`, representing Claws Mail's older release version three, was removed in order to get rid of Python 2.
diff --git a/nixos/modules/module-list.nix b/nixos/modules/module-list.nix
index 6fe6b41c609..dfdac4251a4 100644
--- a/nixos/modules/module-list.nix
+++ b/nixos/modules/module-list.nix
@@ -1029,7 +1029,6 @@
   ./services/web-apps/pgpkeyserver-lite.nix
   ./services/web-apps/powerdns-admin.nix
   ./services/web-apps/matomo.nix
-  ./services/web-apps/moinmoin.nix
   ./services/web-apps/openwebrx.nix
   ./services/web-apps/restya-board.nix
   ./services/web-apps/sogo.nix
diff --git a/nixos/modules/rename.nix b/nixos/modules/rename.nix
index 8e1d6f7bc4a..c290741da04 100644
--- a/nixos/modules/rename.nix
+++ b/nixos/modules/rename.nix
@@ -24,6 +24,7 @@ with lib;
     (mkRemovedOptionModule [ "services" "firefox" "syncserver" "user" ] "")
     (mkRemovedOptionModule [ "services" "firefox" "syncserver" "group" ] "")
     (mkRemovedOptionModule [ "services" "marathon" ] "The corresponding package was removed from nixpkgs.")
+    (mkRemovedOptionModule [ "services" "moinmoin" ] "The corresponding package was removed from nixpkgs.")
     (mkRemovedOptionModule [ "services" "mesos" ] "The corresponding package was removed from nixpkgs.")
     (mkRemovedOptionModule [ "services" "winstone" ] "The corresponding package was removed from nixpkgs.")
     (mkRemovedOptionModule [ "networking" "vpnc" ] "Use environment.etc.\"vpnc/service.conf\" instead.")
diff --git a/nixos/modules/services/web-apps/moinmoin.nix b/nixos/modules/services/web-apps/moinmoin.nix
deleted file mode 100644
index efb73124a23..00000000000
--- a/nixos/modules/services/web-apps/moinmoin.nix
+++ /dev/null
@@ -1,304 +0,0 @@
-{ config, lib, pkgs, ... }:
-with lib;
-
-let
-  cfg = config.services.moinmoin;
-  python = pkgs.python27;
-  pkg = python.pkgs.moinmoin;
-  dataDir = "/var/lib/moin";
-  usingGunicorn = cfg.webServer == "nginx-gunicorn" || cfg.webServer == "gunicorn";
-  usingNginx = cfg.webServer == "nginx-gunicorn";
-  user = "moin";
-  group = "moin";
-
-  uLit = s: ''u"${s}"'';
-  indentLines = n: str: concatMapStrings (line: "${fixedWidthString n " " " "}${line}\n") (splitString "\n" str);
-
-  moinCliWrapper = wikiIdent: pkgs.writeShellScriptBin "moin-${wikiIdent}" ''
-    ${pkgs.su}/bin/su -s ${pkgs.runtimeShell} -c "${pkg}/bin/moin --config-dir=/var/lib/moin/${wikiIdent}/config $*" ${user}
-  '';
-
-  wikiConfig = wikiIdent: w: ''
-    # -*- coding: utf-8 -*-
-
-    from MoinMoin.config import multiconfig, url_prefix_static
-
-    class Config(multiconfig.DefaultConfig):
-        ${optionalString (w.webLocation != "/") ''
-          url_prefix_static = '${w.webLocation}' + url_prefix_static
-        ''}
-
-        sitename = u'${w.siteName}'
-        page_front_page = u'${w.frontPage}'
-
-        data_dir = '${dataDir}/${wikiIdent}/data'
-        data_underlay_dir = '${dataDir}/${wikiIdent}/underlay'
-
-        language_default = u'${w.languageDefault}'
-        ${optionalString (w.superUsers != []) ''
-          superuser = [${concatMapStringsSep ", " uLit w.superUsers}]
-        ''}
-
-    ${indentLines 4 w.extraConfig}
-  '';
-  wikiConfigFile = name: wiki: pkgs.writeText "${name}.py" (wikiConfig name wiki);
-
-in
-{
-  options.services.moinmoin = with types; {
-    enable = mkEnableOption "MoinMoin Wiki Engine";
-
-    webServer = mkOption {
-      type = enum [ "nginx-gunicorn" "gunicorn" "none" ];
-      default = "nginx-gunicorn";
-      example = "none";
-      description = ''
-        Which web server to use to serve the wiki.
-        Use <literal>none</literal> if you want to configure this yourself.
-      '';
-    };
-
-    gunicorn.workers = mkOption {
-      type = ints.positive;
-      default = 3;
-      example = 10;
-      description = ''
-        The number of worker processes for handling requests.
-      '';
-    };
-
-    wikis = mkOption {
-      type = attrsOf (submodule ({ name, ... }: {
-        options = {
-          siteName = mkOption {
-            type = str;
-            default = "Untitled Wiki";
-            example = "ExampleWiki";
-            description = ''
-              Short description of your wiki site, displayed below the logo on each page, and
-              used in RSS documents as the channel title.
-            '';
-          };
-
-          webHost = mkOption {
-            type = str;
-            description = "Host part of the wiki URL. If undefined, the name of the attribute set will be used.";
-            example = "wiki.example.org";
-          };
-
-          webLocation = mkOption {
-            type = str;
-            default = "/";
-            example = "/moin";
-            description = "Location part of the wiki URL.";
-          };
-
-          frontPage = mkOption {
-            type = str;
-            default = "LanguageSetup";
-            example = "FrontPage";
-            description = ''
-              Front page name. Set this to something like <literal>FrontPage</literal> once languages are
-              configured.
-            '';
-          };
-
-          superUsers = mkOption {
-            type = listOf str;
-            default = [];
-            example = [ "elvis" ];
-            description = ''
-              List of trusted user names with wiki system administration super powers.
-
-              Please note that accounts for these users need to be created using the <command>moin</command> command-line utility, e.g.:
-              <command>moin-<replaceable>WIKINAME</replaceable> account create --name=<replaceable>NAME</replaceable> --email=<replaceable>EMAIL</replaceable> --password=<replaceable>PASSWORD</replaceable></command>.
-            '';
-          };
-
-          languageDefault = mkOption {
-            type = str;
-            default = "en";
-            example = "de";
-            description = "The ISO-639-1 name of the main wiki language. Languages that MoinMoin does not support are ignored.";
-          };
-
-          extraConfig = mkOption {
-            type = lines;
-            default = "";
-            example = ''
-              show_hosts = True
-              search_results_per_page = 100
-              acl_rights_default = u"Known:read,write,delete,revert All:read"
-              logo_string = u"<h2>\U0001f639</h2>"
-              theme_default = u"modernized"
-
-              user_checkbox_defaults = {'show_page_trail': 0, 'edit_on_doubleclick': 0}
-              navi_bar = [u'SomePage'] + multiconfig.DefaultConfig.navi_bar
-              actions_excluded = multiconfig.DefaultConfig.actions_excluded + ['newaccount']
-
-              mail_smarthost = "mail.example.org"
-              mail_from = u"Example.Org Wiki <wiki@example.org>"
-            '';
-            description = ''
-              Additional configuration to be appended verbatim to this wiki's config.
-
-              See <link xlink:href='http://moinmo.in/HelpOnConfiguration' /> for documentation.
-            '';
-          };
-
-        };
-        config = {
-          webHost = mkDefault name;
-        };
-      }));
-      example = literalExpression ''
-        {
-          "mywiki" = {
-            siteName = "Example Wiki";
-            webHost = "wiki.example.org";
-            superUsers = [ "admin" ];
-            frontPage = "Index";
-            extraConfig = "page_category_regex = ur'(?P<all>(Category|Kategorie)(?P<key>(?!Template)\S+))'"
-          };
-        }
-      '';
-      description = ''
-        Configurations of the individual wikis. Attribute names must be valid Python
-        identifiers of the form <literal>[A-Za-z_][A-Za-z0-9_]*</literal>.
-
-        For every attribute <replaceable>WIKINAME</replaceable>, a helper script
-        moin-<replaceable>WIKINAME</replaceable> is created which runs the
-        <command>moin</command> command under the <literal>moin</literal> user (to avoid
-        file ownership issues) and with the right configuration directory passed to it.
-      '';
-    };
-  };
-
-  config = mkIf cfg.enable {
-    assertions = forEach (attrNames cfg.wikis) (wname:
-      { assertion = builtins.match "[A-Za-z_][A-Za-z0-9_]*" wname != null;
-        message = "${wname} is not valid Python identifier";
-      }
-    );
-
-    users.users = {
-      moin = {
-        description = "MoinMoin wiki";
-        home = dataDir;
-        group = group;
-        isSystemUser = true;
-      };
-    };
-
-    users.groups = {
-      moin = {
-        members = mkIf usingNginx [ config.services.nginx.user ];
-      };
-    };
-
-    environment.systemPackages = [ pkg ] ++ map moinCliWrapper (attrNames cfg.wikis);
-
-    systemd.services = mkIf usingGunicorn
-      (flip mapAttrs' cfg.wikis (wikiIdent: wiki:
-        nameValuePair "moin-${wikiIdent}"
-          {
-            description = "MoinMoin wiki ${wikiIdent} - gunicorn process";
-            wantedBy = [ "multi-user.target" ];
-            after = [ "network.target" ];
-            restartIfChanged = true;
-            restartTriggers = [ (wikiConfigFile wikiIdent wiki) ];
-
-            environment = let
-              penv = python.buildEnv.override {
-                # setuptools: https://github.com/benoitc/gunicorn/issues/1716
-                extraLibs = [ python.pkgs.eventlet python.pkgs.setuptools pkg ];
-              };
-            in {
-              PYTHONPATH = "${dataDir}/${wikiIdent}/config:${penv}/${python.sitePackages}";
-            };
-
-            preStart = ''
-              umask 0007
-              rm -rf ${dataDir}/${wikiIdent}/underlay
-              cp -r ${pkg}/share/moin/underlay ${dataDir}/${wikiIdent}/
-              chmod -R u+w ${dataDir}/${wikiIdent}/underlay
-            '';
-
-            startLimitIntervalSec = 30;
-
-            serviceConfig = {
-              User = user;
-              Group = group;
-              WorkingDirectory = "${dataDir}/${wikiIdent}";
-              ExecStart = ''${python.pkgs.gunicorn}/bin/gunicorn moin_wsgi \
-                --name gunicorn-${wikiIdent} \
-                --workers ${toString cfg.gunicorn.workers} \
-                --worker-class eventlet \
-                --bind unix:/run/moin/${wikiIdent}/gunicorn.sock
-              '';
-
-              Restart = "on-failure";
-              RestartSec = "2s";
-
-              StateDirectory = "moin/${wikiIdent}";
-              StateDirectoryMode = "0750";
-              RuntimeDirectory = "moin/${wikiIdent}";
-              RuntimeDirectoryMode = "0750";
-
-              NoNewPrivileges = true;
-              ProtectSystem = "strict";
-              ProtectHome = true;
-              PrivateTmp = true;
-              PrivateDevices = true;
-              PrivateNetwork = true;
-              ProtectKernelTunables = true;
-              ProtectKernelModules = true;
-              ProtectControlGroups = true;
-              RestrictAddressFamilies = [ "AF_UNIX" "AF_INET" "AF_INET6" ];
-              RestrictNamespaces = true;
-              LockPersonality = true;
-              MemoryDenyWriteExecute = true;
-              RestrictRealtime = true;
-            };
-          }
-      ));
-
-    services.nginx = mkIf usingNginx {
-      enable = true;
-      virtualHosts = flip mapAttrs' cfg.wikis (name: w: nameValuePair w.webHost {
-        forceSSL = mkDefault true;
-        enableACME = mkDefault true;
-        locations."${w.webLocation}" = {
-          extraConfig = ''
-            proxy_set_header Host $host;
-            proxy_set_header X-Real-IP $remote_addr;
-            proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
-            proxy_set_header X-Forwarded-Proto $scheme;
-            proxy_set_header X-Forwarded-Host $host;
-            proxy_set_header X-Forwarded-Server $host;
-
-            proxy_pass http://unix:/run/moin/${name}/gunicorn.sock;
-          '';
-        };
-      });
-    };
-
-    systemd.tmpfiles.rules = [
-      "d  /run/moin            0750 ${user} ${group} - -"
-      "d  ${dataDir}           0550 ${user} ${group} - -"
-    ]
-    ++ (concatLists (flip mapAttrsToList cfg.wikis (wikiIdent: wiki: [
-      "d  ${dataDir}/${wikiIdent}                      0750 ${user} ${group} - -"
-      "d  ${dataDir}/${wikiIdent}/config               0550 ${user} ${group} - -"
-      "L+ ${dataDir}/${wikiIdent}/config/wikiconfig.py -    -       -        - ${wikiConfigFile wikiIdent wiki}"
-      # needed in order to pass module name to gunicorn
-      "L+ ${dataDir}/${wikiIdent}/config/moin_wsgi.py  -    -       -        - ${pkg}/share/moin/server/moin.wsgi"
-      # seed data files
-      "C  ${dataDir}/${wikiIdent}/data                 0770 ${user} ${group} - ${pkg}/share/moin/data"
-      # fix nix store permissions
-      "Z  ${dataDir}/${wikiIdent}/data                 0770 ${user} ${group} - -"
-    ])));
-  };
-
-  meta.maintainers = with lib.maintainers; [ mmilata ];
-}
diff --git a/nixos/tests/all-tests.nix b/nixos/tests/all-tests.nix
index 0dbd3671877..db526df392b 100644
--- a/nixos/tests/all-tests.nix
+++ b/nixos/tests/all-tests.nix
@@ -273,7 +273,6 @@ in
   misc = handleTest ./misc.nix {};
   mjolnir = handleTest ./matrix/mjolnir.nix {};
   mod_perl = handleTest ./mod_perl.nix {};
-  moinmoin = handleTest ./moinmoin.nix {};
   mongodb = handleTest ./mongodb.nix {};
   moodle = handleTest ./moodle.nix {};
   morty = handleTest ./morty.nix {};
diff --git a/nixos/tests/moinmoin.nix b/nixos/tests/moinmoin.nix
deleted file mode 100644
index ac327498eba..00000000000
--- a/nixos/tests/moinmoin.nix
+++ /dev/null
@@ -1,28 +0,0 @@
-import ./make-test-python.nix ({ pkgs, lib, ... }: {
-  name = "moinmoin";
-  meta.maintainers = with lib.maintainers; [ mmilata ];
-
-  machine =
-    { ... }:
-    { services.moinmoin.enable = true;
-      services.moinmoin.wikis.ExampleWiki.superUsers = [ "admin" ];
-      services.moinmoin.wikis.ExampleWiki.webHost = "localhost";
-
-      services.nginx.virtualHosts.localhost.enableACME = false;
-      services.nginx.virtualHosts.localhost.forceSSL = false;
-    };
-
-  testScript = ''
-    start_all()
-
-    machine.wait_for_unit("moin-ExampleWiki.service")
-    machine.wait_for_unit("nginx.service")
-    machine.wait_for_file("/run/moin/ExampleWiki/gunicorn.sock")
-
-    assert "If you have just installed" in machine.succeed("curl -L http://localhost/")
-
-    assert "status success" in machine.succeed(
-        "moin-ExampleWiki account create --name=admin --email=admin@example.com --password=foo 2>&1"
-    )
-  '';
-})
diff --git a/pkgs/development/python-modules/moinmoin/default.nix b/pkgs/development/python-modules/moinmoin/default.nix
deleted file mode 100644
index b4ecf28724a..00000000000
--- a/pkgs/development/python-modules/moinmoin/default.nix
+++ /dev/null
@@ -1,35 +0,0 @@
-{ lib, buildPythonPackage, fetchurl, isPy3k
-, pytest, werkzeug, pygments
-}:
-
-buildPythonPackage rec {
-  pname = "moinmoin";
-  version = "1.9.11";
-
-  # SyntaxError in setup.py
-  disabled = isPy3k;
-
-  src = fetchurl {
-    url = "http://static.moinmo.in/files/moin-${version}.tar.gz";
-    sha256 = "sha256-Ar4x1V851P4MYlPfi0ngG3bQlWNMvRtW0YX2bh4MPPU=";
-  };
-
-  patches = [
-    # Recommended to install on their download page.
-    ./fix_tests.patch
-  ];
-
-  prePatch = ''
-    sed -i "s/\xfc/ü/" setup.cfg
-  '';
-
-  checkInputs = [ pytest werkzeug pygments ];
-
-  meta = with lib; {
-    description = "Advanced, easy to use and extensible WikiEngine";
-
-    homepage = "https://moinmo.in/";
-
-    license = licenses.gpl2Plus;
-  };
-}
diff --git a/pkgs/development/python-modules/moinmoin/fix_tests.patch b/pkgs/development/python-modules/moinmoin/fix_tests.patch
deleted file mode 100644
index e9856eeffca..00000000000
--- a/pkgs/development/python-modules/moinmoin/fix_tests.patch
+++ /dev/null
@@ -1,16 +0,0 @@
-diff -ru3 moin-1.9.9-old/MoinMoin/conftest.py moin-1.9.9-new/MoinMoin/conftest.py
---- moin-1.9.9-old/MoinMoin/conftest.py	2016-10-31 23:44:02.000000000 +0300
-+++ moin-1.9.9-new/MoinMoin/conftest.py	2018-02-18 12:13:19.551929093 +0300
-@@ -22,10 +22,11 @@
- 
- import atexit
- import sys
-+import os
- 
- import py
- 
--rootdir = py.magic.autopath().dirpath()
-+rootdir = os.path.abspath(os.path.dirname(__file__))
- moindir = rootdir.join("..")
- sys.path.insert(0, str(moindir))
- 
diff --git a/pkgs/top-level/python2-packages.nix b/pkgs/top-level/python2-packages.nix
index 5efc4005373..1f894f3a14b 100644
--- a/pkgs/top-level/python2-packages.nix
+++ b/pkgs/top-level/python2-packages.nix
@@ -288,9 +288,6 @@ with self; with super; {
 
   mock = callPackage ../development/python-modules/mock/2.nix { };
 
-  # Needed here because moinmoin is loaded as a Python library.
-  moinmoin = callPackage ../development/python-modules/moinmoin { };
-
   monosat = disabled super.monosat;
 
   more-itertools = callPackage ../development/python-modules/more-itertools/2.7.nix { };