{ pkgs ? import <nixpkgs> { }, lint ? false }:
pkgs.python3Packages.callPackage ({ autopep8, buildPythonPackage
  , gobject-introspection, gtk4, lib, mypy, pylint, pygobject3, wrapGAppsHook4,
  }:
  buildPythonPackage rec {
    pname = "apps";
    version = "1.0";

    src = lib.cleanSource ./.;

    doCheck = true;
    checkPhase = "./test.sh";

    nativeBuildInputs = [ gobject-introspection wrapGAppsHook4 ];
    nativeCheckInputs = [ mypy ] ++ lib.optionals lint [ autopep8 pylint ];
    buildInputs = [ gtk4 ];
    pythonPath = [ pygobject3 ];

  }) { }