anchor.diff:  let
     inherit (python2Packages) python pygtk;
   in stdenv.mkDerivation rec {
  -  name = "spice-gtk-0.34";
  +  name = "spice-gtk-0.35";
   
     outputs = [ "out" "dev" ];
   
     src = fetchurl {
       url = "https://www.spice-space.org/download/gtk/${name}.tar.bz2";
  -    sha256 = "1vknp72pl6v6nf3dphhwp29hk6gv787db2pmyg4m312z2q0hwwp9";
  +    sha256 = "11lymg467gvj5ys8k22ihnfbxjn4x34ygyzirpg2nphjwlyhgrml";
     };
   
     postPatch = ''
  
positive.code: 
    buildInputs = [
      spice-protocol celt_0_5_1 openssl libpulseaudio gst_all_1.gst-plugins-base pixman
      libjpeg_turbo zlib cyrus_sasl python pygtk usbredir gtk3 epoxy libdrm phodav
    ] ++ optionals withPolkit [ polkit acl usbutils ] ;
  
    nativeBuildInputs = [ pkgconfig gettext libsoup autoreconfHook vala gobjectIntrospection ];
  
negative.code:     "--with-gtk3"
      "--enable-introspection"
      "--enable-vala"
      "--enable-celt051"
    ];
  
    dontDisableStatic = true; # Needed by the coroutine test
  