anchor.diff:  
   rec {
   
  -  firefoxVersion = "3.6.3";
  +  firefoxVersion = "3.6.4";
     
  -  xulVersion = "1.9.2.3"; # this attribute is used by other packages
  +  xulVersion = "1.9.2.4"; # this attribute is used by other packages
   
     
     src = fetchurl {
       url = "http://releases.mozilla.org/pub/mozilla.org/firefox/releases/${firefoxVersion}/source/firefox-${firefoxVersion}.source.tar.bz2";
  -    sha256 = "1l5290l1jrglvih0957iv8xn5sxmqklx67kqqnv059dsg5fv781m";
  +    sha1 = "c73e4cf4a8e55b5a192fe59d38bef1d06f43e842";
     };
   
   
  
positive.code:       [ pkgconfig gtk perl zip libIDL libjpeg libpng zlib cairo bzip2
          python dbus dbus_glib pango freetype fontconfig xlibs.libXi
          xlibs.libX11 xlibs.libXrender xlibs.libXft xlibs.libXt file
          alsaLib nspr /* nss */ libnotify
        ];
  
      configureFlags =
  
negative.code:     buildInputs =
        [ pkgconfig gtk perl zip libIDL libjpeg zlib cairo bzip2 python
          dbus dbus_glib pango freetype fontconfig alsaLib nspr libnotify
          xlibs.pixman
        ];
  
      propagatedBuildInputs = [xulrunner];
  