anchor.diff:    # where to find the plugin in its tree.
     plugins = map (x: x + x.mozillaPlugin) plugins;
     libs = map (x: x + "/lib") libs ++ map (x: x + "/lib64") libs;
  -  gst_plugins = map (x: x + "/lib/gstreamer-0.10") gst_plugins;
     gtk_modules = map (x: x + x.gtkModule) gtk_modules;
   
     meta = {
  
positive.code:         --suffix-each LD_LIBRARY_PATH ':' "$libs" \
          --suffix-each GTK_PATH ':' "$gtk_modules" \
          --suffix-each LD_PRELOAD ':' "$(cat $(filterExisting $(addSuffix /extra-ld-preload $plugins)))" \
          --suffix-each GST_PLUGIN_PATH ':' "$gst_plugins" \
          --prefix-contents PATH ':' "$(filterExisting $(addSuffix /extra-bin-path $plugins))"
  
      mkdir -p $out/share/applications
  
negative.code:     categories = "Application;Network;WebBrowser;";
    };
  
    buildInputs = [makeWrapper] ++ gst_plugins;
  
    buildCommand = ''
      if [ ! -x "${browser}/bin/${browserName}" ]
  