{
  description = "GTK controls wrapper for playerctl";

  inputs = {
    nixpkgs.url = "github:NixOS/nixpkgs/nixos-unstable";
  };

  outputs = { self, nixpkgs }:
    let
      systems = [ "x86_64-linux" "aarch64-linux" "aarch64-darwin" "x86_64-darwin" ];
      forAllSystems = nixpkgs.lib.genAttrs systems;
    in {
      packages = forAllSystems (system:
        let
          pkgs = import nixpkgs { inherit system; };
          pythonPath = pkgs.python3Packages.makePythonPath ([ pkgs.python3Packages.pygobject3 ]);
        in {
          default = pkgs.stdenv.mkDerivation {
            pname = "playerctl-gtk";
            version = "0.1.0";
            src = self;

            dontConfigure = true;
            dontBuild = true;

            nativeBuildInputs = [
              pkgs.wrapGAppsHook
              pkgs.python3
            ];

            buildInputs = [
              pkgs.python3Packages.pygobject3
              pkgs.playerctl
              pkgs.gtk3
              pkgs.gsettings-desktop-schemas
              pkgs.adwaita-icon-theme
              pkgs.gobject-introspection
            ];

            installPhase = ''
              runHook preInstall
              install -Dm755 playerctl_gui.py $out/bin/playerctl-gtk
              patchShebangs $out/bin/playerctl-gtk
              runHook postInstall
            '';

            preFixup = ''
              gappsWrapperArgs+=(--prefix PYTHONPATH : "${pythonPath}")
              gappsWrapperArgs+=(--prefix PATH : ${pkgs.lib.makeBinPath [ pkgs.playerctl ]})
            '';
          };
        });

      apps = forAllSystems (system:
        let
          pkg = self.packages.${system}.default;
        in {
          default = {
            type = "app";
            program = "${pkg}/bin/playerctl-gtk";
          };
        });

      devShells = forAllSystems (system:
        let
          pkgs = import nixpkgs { inherit system; };
        in {
          default = pkgs.mkShell {
            buildInputs = [
              pkgs.python3
              pkgs.python3Packages.pygobject3
              pkgs.playerctl
              pkgs.gtk3
              pkgs.gobject-introspection
            ];
          };
        });
    };
}