anchor.diff:  
     directfb = import ../development/libraries/directfb {
       inherit fetchurl stdenv perl zlib libjpeg freetype
  -      SDL libpng;
  -    inherit (xlibs) libX11 libXext xproto xextproto;
  +      SDL libpng giflib;
  +    inherit (xlibs) libX11 libXext xproto xextproto renderproto
  +      libXrender;
     };
   
     enchant = makeOverridable
  
positive.code:     inherit fetchurl glibc;
      # Dietlibc 0.30 doesn't compile on PPC with GCC 4.1, bus GCC 3.4 works.
      stdenv = if stdenv.system == "powerpc-linux" then overrideGCC stdenv gcc34 else stdenv;
    };
  
    dmraid = builderDefsPackage ../os-specific/linux/dmraid {
  
negative.code:   };
  
    links2 = (builderDefsPackage ../applications/networking/browsers/links2) {
      inherit fetchurl stdenv bzip2 zlib libjpeg libpng libtiff
        gpm openssl SDL SDL_image SDL_net pkgconfig;
      inherit (xlibs) libX11 libXau xproto libXt;
    };
  