anchor.diff:  , zenity
   , libcanberra
   , ninja
  +, xvfb-run
   , xkeyboard_config
   , libxkbfile
   , libXdamage
  
positive.code:     mesa # needed for gbm
      meson
      ninja
      pkg-config
      python3
      wrapGAppsHook
  
negative.code: 
  let self = stdenv.mkDerivation rec {
    pname = "mutter";
    version = "41.0";
  
    outputs = [ "out" "dev" "man" ];
  
    src = fetchurl {
      url = "mirror://gnome/sources/mutter/${lib.versions.major version}/${pname}-${version}.tar.xz";
      sha256 = "sha256-+oChp0QETYjr/Wd/8DID1ncF7SzWJOoGy7i1iUjN+J4=";
    };
  
    patches = [
  