anchor.diff:    buildInputs =
       [ pkgconfig x11 fontconfig pixman xlibs.libXrender ]
       ++ stdenv.lib.optionals xcbSupport [ libxcb xcbutil ]
  -    ++ stdenv.lib.optional gobjectSupport glib;
  +    ++ stdenv.lib.optional gobjectSupport glib
  +
  +    # On non-GNU systems we need GNU Gettext for libintl.
  +    ++ stdenv.lib.optional (!stdenv.isLinux) gettext;
   
     propagatedBuildInputs =
       [ freetype ] ++
  
positive.code: , gobjectSupport ? true, glib
  , stdenv, fetchurl, pkgconfig, x11, fontconfig, freetype, xlibs
  , zlib, libpng, pixman, libxcb ? null, xcbutil ? null
  }:
  
  assert postscriptSupport -> zlib != null;
  
negative.code:     homepage = http://cairographics.org/;
  
      licenses = [ "LGPLv2+" "MPLv1" ];
  
      platforms = stdenv.lib.platforms.all;
    };
  }
  