anchor.diff:        --prefix XDG_DATA_DIRS : "${librsvg}/share"
         --prefix XDG_DATA_DIRS : "${shared-mime-info}/share"
       )
  -  '';
  -
  -  postPatch = ''
  -    patchShebangs build-aux/meson/postinstall.py
     '';
   
     passthru = {
  
positive.code:     meson
      ninja
      pkg-config
      python3
      wrapGAppsHook
    ];
  
    buildInputs = [
  
negative.code: 
  stdenv.mkDerivation rec {
    pname = "nautilus";
    version = "43.alpha";
  
    outputs = [ "out" "dev" ];
  
    src = fetchurl {
      url = "mirror://gnome/sources/${pname}/${lib.versions.major version}/${pname}-${version}.tar.xz";
      sha256 = "hjVoot3dHPgTNmbDe4Cwf4AN6Wbomh0l4QM0mP+iw5k=";
    };
  
    patches = [
  