anchor.diff:    };
   
     pth = import ../development/libraries/pth {
  +    inherit fetchurl stdenv;
  +  };
  +
  +  pthread_stubs = import ../development/libraries/pthread-stubs {
       inherit fetchurl stdenv;
     };
   
  
positive.code: 
    scummvm = import ../games/scummvm {
      inherit fetchurl stdenv SDL zlib mpeg2dec;
    };
  
    # You still can override by passing more arguments.
  
negative.code:     #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;
  