anchor.diff:  
     nativeBuildInputs = [ wrapGAppsHook ];
   
  -  propagatedBuildInputs = with python3Packages; [
  +  propagatedBuildInputs = with python3.pkgs; [
       pygobject3
       pycairo
     ];
   
     meta = with lib; {
  +    homepage = "http://johncheetham.com/projects/gshogi/";
       description = "A graphical implementation of the Shogi board game, also known as Japanese Chess";
  -    homepage = "http://johncheetham.com/projects/gshogi/";
  -    license = licenses.gpl3;
  +    license = licenses.gpl3Plus;
       platforms = platforms.linux;
       maintainers = [ maintainers.ciil ];
     };
  
positive.code:     owner = "johncheetham";
      repo = "gshogi";
      rev = "v${version}";
      sha256 = "06vgndfgwyfi50wg3cw92zspc9z0k7xn2pp6qsjih0l5yih8iwqh";
    };
  
    doCheck = false;  # no tests available
  
negative.code: { lib
  , fetchFromGitHub
  , gobject-introspection
  , gtk3
  , python3
  , wrapGAppsHook
  }:
  
  python3.pkgs.buildPythonApplication rec {
    pname = "gshogi";
    version = "0.5.1";
  
  