{
  config,
  lib,
  stdenv,
  fetchurl,
  fetchpatch,
  gettext,
  meson,
  ninja,
  pkg-config,
  perl,
  python3,
  libiconv,
  zlib,
  libffi,
  pcre2,
  elfutils, # gnome,
  libselinux,
  bash,
  gnum4,
  gtk-doc,
  docbook_xsl,
  docbook_xml_dtd_45,
  libxslt,
  # use util-linuxMinimal to avoid circular dependency (util-linux, systemd, glib)
  util-linuxMinimal ? null,
  buildPackages,

  # for passthru.tests
  # this is just for tests (not in the closure of any regular package)
  coreutils,
  dbus,
  libxml2,
  tzdata,
  desktop-file-utils,
  shared-mime-info,
  darwin,
  # , makeHardcodeGsettingsPatch
  testers,
}:

assert stdenv.isLinux -> util-linuxMinimal != null;

let
  # Some packages don't get "Cflags" from pkg-config correctly
  # and then fail to build when directly including like <glib/...>.
  # This is intended to be run in postInstall of any package
  # which has $out/include/ containing just some disjunct directories.
  flattenInclude = ''
    for dir in "''${!outputInclude}"/include/*; do
      cp -r "$dir"/* "''${!outputInclude}/include/"
      rm -r "$dir"
      ln -s . "$dir"
    done
    ln -sr -t "''${!outputInclude}/include/" "''${!outputInclude}"/lib/*/include/* 2>/dev/null || true
  '';

  buildDocs = stdenv.hostPlatform == stdenv.buildPlatform && !stdenv.hostPlatform.isStatic;
in

stdenv.mkDerivation (finalAttrs: {
  pname = "glib";
  version = "2.78.4";

  src = fetchurl {
    url = "mirror://gnome/sources/glib/${lib.versions.majorMinor finalAttrs.version}/glib-${finalAttrs.version}.tar.xz";
    sha256 = "sha256-JLjgZy3KEgzDLTlLzLhYROcy4E/nXRi7BXOy28dUj2M=";
  };

  patches =
    lib.optionals stdenv.isDarwin [ ./darwin-compilation.patch ]
    ++ lib.optionals stdenv.hostPlatform.isMusl [
      ./quark_init_on_demand.patch
      ./gobject_init_on_demand.patch
    ]
    ++ [
      (fetchpatch {
        name = "GLib-against-PCRE2-10.43.patch";
        url = "https://gitlab.gnome.org/GNOME/glib/-/commit/cce3ae98a2c1966719daabff5a4ec6cf94a846f6.patch";
        hash = "sha256-vgKzb5hQmFQGD8zxRrXnuX9Gpg/TeSrzehlOH2vA1xU=";
      })

      ./glib-appinfo-watch.patch
      ./schema-override-variable.patch

      # Add support for Pantheon’s terminal emulator.
      ./elementary-terminal-support.patch

      # GLib contains many binaries used for different purposes;
      # we will install them to different outputs:
      # 1. Tools for desktop environment ($bin)
      #    * gapplication (non-darwin)
      #    * gdbus
      #    * gio
      #    * gio-launch-desktop (symlink to $out)
      #    * gsettings
      # 2. Development/build tools ($dev)
      #    * gdbus-codegen
      #    * gio-querymodules
      #    * glib-compile-resources
      #    * glib-compile-schemas
      #    * glib-genmarshal
      #    * glib-gettextize
      #    * glib-mkenums
      #    * gobject-query
      #    * gresource
      #    * gtester
      #    * gtester-report
      # 3. Tools for desktop environment that cannot go to $bin due to $out depending on them ($out)
      #    * gio-launch-desktop
      ./split-dev-programs.patch

      # Disable flaky test.
      # https://gitlab.gnome.org/GNOME/glib/-/issues/820
      ./skip-timer-test.patch
    ];

  outputs = [
    "bin"
    "out"
    "dev"
    "devdoc"
  ];

  setupHook = ./setup-hook.sh;

  buildInputs =
    [
      finalAttrs.setupHook
      pcre2
    ]
    ++ lib.optionals (!stdenv.hostPlatform.isWindows) [
      bash
      gnum4 # install glib-gettextize and m4 macros for other apps to use
    ]
    ++ lib.optionals (lib.meta.availableOn stdenv.hostPlatform elfutils) [ elfutils ]
    ++ lib.optionals stdenv.isLinux [
      libselinux
      util-linuxMinimal # for libmount
    ]
    ++ lib.optionals stdenv.isDarwin (
      with darwin.apple_sdk.frameworks;
      [
        AppKit
        Carbon
        Cocoa
        CoreFoundation
        CoreServices
        Foundation
      ]
    )
    ++ lib.optionals buildDocs [
      # Note: this needs to be both in buildInputs and nativeBuildInputs. The
      # Meson gtkdoc module uses find_program to look it up (-> build dep), but
      # glib's own Meson configuration uses the host pkg-config to find its
      # version (-> host dep). We could technically go and fix this in glib, add
      # pkg-config to depsBuildBuild, but this would be a futile exercise since
      # Meson's gtkdoc integration does not support cross compilation[1] anyway
      # and this derivation disables the docs build when cross compiling.
      #
      # [1] https://github.com/mesonbuild/meson/issues/2003
      gtk-doc
    ];

  strictDeps = true;

  nativeBuildInputs =
    [
      meson
      ninja
      pkg-config
      perl
      python3
      gettext
      libxslt
      docbook_xsl
    ]
    ++ lib.optionals buildDocs [
      gtk-doc
      docbook_xml_dtd_45
      libxml2
    ];

  propagatedBuildInputs = [
    zlib
    libffi
    gettext
    libiconv
  ];

  mesonFlags =
    [
      # Avoid the need for gobject introspection binaries in PATH in cross-compiling case.
      # Instead we just copy them over from the native output.
      "-Dgtk_doc=${lib.boolToString buildDocs}"
      "-Dnls=enabled"
      "-Ddevbindir=${placeholder "dev"}/bin"
    ]
    ++ lib.optionals (!lib.meta.availableOn stdenv.hostPlatform elfutils) [ "-Dlibelf=disabled" ]
    ++ lib.optionals (!stdenv.isDarwin) [
      "-Dman=true" # broken on Darwin
    ]
    ++ lib.optionals stdenv.isFreeBSD [
      "-Db_lundef=false"
      "-Dxattr=false"
    ];

  env.NIX_CFLAGS_COMPILE = toString [
    "-Wno-error=nonnull"
    # Default for release buildtype but passed manually because
    # we're using plain
    "-DG_DISABLE_CAST_CHECKS"
  ];

  postPatch =
    ''
      chmod +x gio/tests/gengiotypefuncs.py
      patchShebangs gio/tests/gengiotypefuncs.py
      chmod +x docs/reference/gio/concat-files-helper.py
      patchShebangs docs/reference/gio/concat-files-helper.py
      patchShebangs glib/gen-unicode-tables.pl
      patchShebangs glib/tests/gen-casefold-txt.py
      patchShebangs glib/tests/gen-casemap-txt.py
      patchShebangs tools/gen-visibility-macros.py

      # Needs machine-id, comment the test
      sed -e '/\/gdbus\/codegen-peer-to-peer/ s/^\/*/\/\//' -i gio/tests/gdbus-peer.c
      sed -e '/g_test_add_func/ s/^\/*/\/\//' -i gio/tests/gdbus-address-get-session.c
      # All gschemas fail to pass the test, upstream bug?
      sed -e '/g_test_add_data_func/ s/^\/*/\/\//' -i gio/tests/gschema-compile.c
      # Cannot reproduce the failing test_associations on hydra
      sed -e '/\/appinfo\/associations/d' -i gio/tests/appinfo.c
      # Needed because of libtool wrappers
      sed -e '/g_subprocess_launcher_set_environ (launcher, envp);/a g_subprocess_launcher_setenv (launcher, "PATH", g_getenv("PATH"), TRUE);' -i gio/tests/gsubprocess.c
    ''
    + lib.optionalString stdenv.hostPlatform.isWindows ''
      substituteInPlace gio/win32/meson.build \
        --replace "libintl, " ""
    '';

  postConfigure = ''
    patchShebangs gio/gdbus-2.0/codegen/gdbus-codegen gobject/glib-{genmarshal,mkenums}
  '';

  DETERMINISTIC_BUILD = 1;

  postInstall =
    ''
      moveToOutput "share/glib-2.0" "$dev"
      substituteInPlace "$dev/bin/gdbus-codegen" --replace "$out" "$dev"
      sed -i "$dev/bin/glib-gettextize" -e "s|^gettext_dir=.*|gettext_dir=$dev/share/glib-2.0/gettext|"

      # This file is *included* in gtk3 and would introduce runtime reference via __FILE__.
      sed '1i#line 1 "glib-${finalAttrs.version}/include/glib-2.0/gobject/gobjectnotifyqueue.c"' \
        -i "$dev"/include/glib-2.0/gobject/gobjectnotifyqueue.c
      for i in $bin/bin/*; do
        moveToOutput "share/bash-completion/completions/''${i##*/}" "$bin"
      done
      for i in $dev/bin/*; do
        moveToOutput "share/bash-completion/completions/''${i##*/}" "$dev"
      done
    ''
    + lib.optionalString (!buildDocs) ''
      cp -r ${buildPackages.glib.devdoc} $devdoc
    '';

  # Move man pages to the same output as their binaries (needs to be
  # done after preFixupHooks which moves man pages too - in
  # _multioutDocs)
  postFixup = ''
    for i in $dev/bin/*; do
      moveToOutput "share/man/man1/''${i##*/}.1.*" "$dev"
    done
  '';

  nativeCheckInputs = [
    tzdata
    desktop-file-utils
    shared-mime-info
  ];

  preCheck = lib.optionalString finalAttrs.finalPackage.doCheck or config.doCheckByDefault or false ''
    export LD_LIBRARY_PATH="$NIX_BUILD_TOP/glib-${finalAttrs.version}/glib/.libs''${LD_LIBRARY_PATH:+:}$LD_LIBRARY_PATH"
    export TZDIR="${tzdata}/share/zoneinfo"
    export XDG_CACHE_HOME="$TMP"
    export XDG_RUNTIME_HOME="$TMP"
    export HOME="$TMP"
    export XDG_DATA_DIRS="${desktop-file-utils}/share:${shared-mime-info}/share"
    export G_TEST_DBUS_DAEMON="${dbus}/bin/dbus-daemon"
    export PATH="$PATH:$(pwd)/gobject"
    echo "PATH=$PATH"
  '';

  separateDebugInfo = stdenv.isLinux;

  passthru = rec {
    gioModuleDir = "lib/gio/modules";

    makeSchemaDataDirPath = dir: name: "${dir}/share/gsettings-schemas/${name}";
    makeSchemaPath = dir: name: "${makeSchemaDataDirPath dir name}/glib-2.0/schemas";
    getSchemaPath = pkg: makeSchemaPath pkg pkg.name;
    getSchemaDataDirPath = pkg: makeSchemaDataDirPath pkg pkg.name;

    tests = {
      withChecks = finalAttrs.finalPackage.overrideAttrs (_: {
        doCheck = true;
      });
      pkg-config = testers.testMetaPkgConfig finalAttrs.finalPackage;
    };

    inherit flattenInclude;
    # updateScript = gnome.updateScript {
    #   packageName = "glib";
    #   versionPolicy = "odd-unstable";
    # };

    # mkHardcodeGsettingsPatch =
    #   {
    #     src,
    #     glib-schema-to-var,
    #   }:
    #   builtins.trace
    #     "glib.mkHardcodeGsettingsPatch is deprecated, please use makeHardcodeGsettingsPatch instead"
    #     (makeHardcodeGsettingsPatch {
    #       inherit src;
    #       schemaIdToVariableMapping = glib-schema-to-var;
    #     });
  };

  meta = with lib; {
    description = "C library of programming buildings blocks";
    homepage = "https://gitlab.gnome.org/GNOME/glib";
    license = licenses.lgpl21Plus;
    maintainers =
      teams.gnome.members
      ++ (with maintainers; [
        lovek323
        raskin
      ]);
    pkgConfigModules = [
      "gio-2.0"
      "gobject-2.0"
      "gthread-2.0"
    ];
    platforms = platforms.unix ++ platforms.windows;

    longDescription = ''
      GLib provides the core application building blocks for libraries
      and applications written in C.  It provides the core object
      system used in GNOME, the main loop implementation, and a large
      set of utility functions for strings and common data structures.
    '';
  };
})