anchor.diff:  # In that case its about 6MB which could be separated
   
   let
  -  ver_maj = "1.44";
  +  ver_maj = "1.46";
     ver_min = "0";
   in
   stdenv.mkDerivation rec {
  
positive.code:   # Tests depend on cairo, which is undesirable (it pulls in lots of
    # other dependencies).
    configureFlags = [ "--disable-tests" ];
  
    postInstall = "rm -rf $out/share/gtk-doc";
  
  
negative.code: 
    src = fetchurl {
      url = "mirror://gnome/sources/gobject-introspection/${ver_maj}/${name}.tar.xz";
      sha256 = "6658bd3c2b8813eb3e2511ee153238d09ace9d309e4574af27443d87423e4233";
    };
  
    buildInputs = [ flex bison pkgconfig python ]
  