{
  lib,
  stdenv,
  fetchurl,
  fetchpatch,
  makeDesktopItem,
  libX11,
  libXt,
  libXft,
  libXrender,
  libXext,
  ncurses,
  fontconfig,
  freetype,
  pkg-config,
  gdk-pixbuf,
  perl,
  libptytty,
  perlSupport ? true,
  gdkPixbufSupport ? true,
  unicode3Support ? true,
  emojiSupport ? false,
  nixosTests,
}:

let
  pname = "rxvt-unicode";
  version = "9.31";
  description = "A clone of the well-known terminal emulator rxvt";

  desktopItem = makeDesktopItem {
    name = pname;
    exec = "urxvt";
    icon = "utilities-terminal";
    comment = description;
    desktopName = "URxvt";
    genericName = pname;
    categories = [
      "System"
      "TerminalEmulator"
    ];
  };

  fetchPatchFromAUR =
    {
      package,
      name,
      rev,
      sha256,
    }:
    fetchpatch rec {
      url = "https://aur.archlinux.org/cgit/aur.git/plain/${name}?h=${package}&id=${rev}";
      extraPrefix = "";
      inherit name sha256;
    };
in

stdenv.mkDerivation {
  name = "${pname}-unwrapped-${version}";
  inherit pname version;

  src = fetchurl {
    url = "http://dist.schmorp.de/rxvt-unicode/Attic/rxvt-unicode-${version}.tar.bz2";
    sha256 = "qqE/y8FJ/g8/OR+TMnlYD3Spb9MS1u0GuP8DwtRmcug=";
  };

  nativeBuildInputs = [ pkg-config ];
  buildInputs =
    [
      libX11
      libXt
      libXft
      ncurses # required to build the terminfo file
      fontconfig
      freetype
      libXrender
      libptytty
    ]
    ++ lib.optionals perlSupport [
      perl
      libXext
    ]
    ++ lib.optional gdkPixbufSupport gdk-pixbuf;

  outputs = [
    "out"
    "terminfo"
  ];

  patches =
    (
      if emojiSupport then
        [
          # the required patches to libXft are in nixpkgs by default, see
          # ../../../servers/x11/xorg/overrides.nix
          (fetchPatchFromAUR {
            name = "enable-wide-glyphs.patch";
            package = "rxvt-unicode-truecolor-wide-glyphs";
            rev = "69701a09c2c206233952b84bc966407f6774f1dc";
            sha256 = "0jfcj0ahky4dxdfrhqvh1v83mblhf5nak56dk1vq3bhyifdg7ffq";
          })
          (fetchPatchFromAUR {
            name = "improve-font-rendering.patch";
            package = "rxvt-unicode-truecolor-wide-glyphs";
            rev = "69701a09c2c206233952b84bc966407f6774f1dc";
            sha256 = "1jj5ai2182nq912279adihi4zph1w4dvbdqa1pwacy4na6y0fz9y";
          })
        ]
      else
        [
          ./patches/9.06-font-width.patch
        ]
    )
    ++ [
      ./patches/256-color-resources.patch
    ]
    ++ lib.optional (perlSupport && lib.versionAtLeast perl.version "5.38") (fetchpatch {
      name = "perl538-locale-c.patch";
      url = "https://github.com/exg/rxvt-unicode/commit/16634bc8dd5fc4af62faf899687dfa8f27768d15.patch";
      excludes = [ "Changes" ];
      sha256 = "sha256-JVqzYi3tcWIN2j5JByZSztImKqbbbB3lnfAwUXrumHM=";
    })
    ++ lib.optional stdenv.hostPlatform.isDarwin ./patches/makefile-phony.patch;

  configureFlags = [
    "--with-terminfo=${placeholder "terminfo"}/share/terminfo"
    "--enable-256-color"
    (lib.enableFeature perlSupport "perl")
    (lib.enableFeature unicode3Support "unicode3")
  ] ++ lib.optional emojiSupport "--enable-wide-glyphs";

  LDFLAGS = [
    "-lfontconfig"
    "-lXrender"
    "-lpthread"
  ];
  CFLAGS = [ "-I${freetype.dev}/include/freetype2" ];

  preConfigure =
    ''
      # without this the terminfo won't be compiled by tic, see man tic
      mkdir -p $terminfo/share/terminfo
      export TERMINFO=$terminfo/share/terminfo
    ''
    + lib.optionalString perlSupport ''
      # make urxvt find its perl file lib/perl5/site_perl
      # is added to PERL5LIB automatically
      mkdir -p $out/$(dirname ${perl.libPrefix})
      ln -s $out/lib/urxvt $out/${perl.libPrefix}
    '';

  postInstall = ''
    mkdir -p $out/nix-support
    echo "$terminfo" >> $out/nix-support/propagated-user-env-packages
    cp -r ${desktopItem}/share/applications/ $out/share/
  '';

  passthru.tests.test = nixosTests.terminal-emulators.urxvt;

  meta = with lib; {
    inherit description;
    homepage = "http://software.schmorp.de/pkg/rxvt-unicode.html";
    downloadPage = "http://dist.schmorp.de/rxvt-unicode/Attic/";
    maintainers = with maintainers; [ rnhmjoj ];
    platforms = platforms.unix;
    license = licenses.gpl3;
  };
}
