anchor.diff:      platforms   = platforms.unix;
     };
   }
  -
  
positive.code: { fetchurl, stdenv, pkgconfig, python, gstreamer, xlibs, alsaLib, cdparanoia
  , libogg, libtheora, libvorbis, freetype, pango, liboil, glib, cairo
  , libintlOrEmpty
  , # Whether to build no plugins that have external dependencies
    # (except the ALSA plugin).
  
negative.code:   NIX_CFLAGS_COMPILE = stdenv.lib.optionalString stdenv.isDarwin "-lintl";
  
    propagatedBuildInputs = [ gstreamer ];
  
    postInstall = "rm -rf $out/share/gtk-doc";
  
    meta = with stdenv.lib; {
      homepage    = http://gstreamer.freedesktop.org;
      description = "Base plug-ins for GStreamer";
  