anchor.diff:      #enableOfficialBranding = true;
     });
   
  +  firefox3_1 = lowPrio (import ../applications/networking/browsers/firefox-3/3.1.nix {
  +    inherit fetchurl stdenv pkgconfig perl zip libjpeg zlib cairo
  +      python dbus dbus_glib freetype fontconfig bzip2;
  +    inherit (gtkLibs) gtk pango;
  +    inherit (gnome) libIDL;
  +    inherit (alsa) alsaLib;
  +    #enableOfficialBranding = true;
  +    xulrunner = xulrunner3_1;
  +    autoconf = autoconf213;
  +  });
  +
  +  xulrunner3_1 = lowPrio (import ../applications/networking/browsers/firefox-3/xulrunner-3.1.nix {
  +    inherit fetchurl stdenv pkgconfig perl zip libjpeg libpng zlib cairo
  +      python dbus dbus_glib freetype fontconfig bzip2 xlibs file;
  +    inherit (gtkLibs) gtk pango;
  +    inherit (gnome) libIDL;
  +    inherit (alsa) alsaLib;
  +    autoconf = autoconf213;
  +    #enableOfficialBranding = true;
  +  });
  +
     firefox3b1Bin = lowPrio (import ../applications/networking/browsers/firefox-3/binary.nix {
       inherit fetchurl stdenv pkgconfig perl zip libjpeg libpng zlib cairo
         python curl coreutils freetype fontconfig;
  
positive.code: 
    scummvm = import ../games/scummvm {
      inherit fetchurl stdenv SDL zlib mpeg2dec;
    };
  
    # You still can override by passing more arguments.
  
negative.code:     inherit fetchurl stdenv perl m4 lzma;
    };
  
    autoconf213 = import ../development/tools/misc/autoconf/2.13.nix {
      inherit fetchurl stdenv perl m4 lzma;
    };
  
    automake = automake19x;
  
    automake17x = import ../development/tools/misc/automake/automake-1.7.x.nix {
  