{
  pkgs, lib
, python3Packages, python3
, gtk3, gobject-introspection, git, gnome
, wrapGAppsHook
, makeDesktopItem
, fetchFromGitHub
}:

python3Packages.buildPythonApplication rec {
  pname = "key-mapper";
  version = "1.2.1";

  buildInputs = [ gobject-introspection gtk3 gnome.adwaita-icon-theme ];

  nativeBuildInputs = [ wrapGAppsHook ];

  propagatedBuildInputs = with python3.pkgs; [ setuptools pydbus evdev pygobject3 ];

  src = fetchFromGitHub {
    owner = "sezanzeb";
    repo = "key-mapper";
    rev = version;
    sha256 = "07dgp4vays1w4chhd22vlp9bxc49lcgzkvmjqgbr00m3781yjsf7";
  };

  doCheck = false;
  strictDeps = false;

  patches = [
    ./add-scripts.patch
    ./hack-data-dir.patch
  ];

  # Fix keymapper not finding its data files
  preBuild = ''
    sed -e "s|@@NIXOS_OUT_PATH@@|$out/usr/share/key-mapper|" --in-place keymapper/data.py
  '';
  
  # Required as we otherwise don't get the dbus policy installed
  # correctly
  preInstall = ''
    # see https://github.com/pypa/setuptools/issues/130
    ${python3}/bin/${python3.executable} setup.py install_data --install-dir=$out --root=$out
  '';

  postInstall = ''
    # Install the udev rules
    mkdir -p $out/lib/udev/rules.d
    cp data/key-mapper.rules $out/lib/udev/rules.d/key-mapper.rules
    sed --in-place -e "s|/bin/key-mapper-control|$out/bin/key-mapper-control|" $out/lib/udev/rules.d/key-mapper.rules

    # Install the desktop file
    mkdir -p $out/share/icons/hicolor/scalable/apps/
    cp -r ${desktopItem}/share/applications $out/share/
    cp $out/usr/share/key-mapper/key-mapper.svg $out/share/icons/hicolor/scalable/apps/key-mapper.svg
  '';
  
  desktopItem = makeDesktopItem {
    name = "key-mapper";
    exec = "key-mapper-gtk";
    icon = "key-mapper";
    desktopName = "key-mapper";
    genericName = "key-mapper";
  };
  
  meta = with lib; {
    homepage = "https://github.com/sezanzeb/key-mapper";
    description = "A tool to change the mapping of your input device buttons";
    license = licenses.gpl3;
    maintainers = [ ];
    platforms = lib.platforms.linux;
  };
}