anchor.diff:        --prefix XDG_DATA_DIRS : "${gnome_themes_standard}/share:$out/share:$XDG_ICON_DIRS" \
         --suffix XDG_DATA_DIRS : "$GSETTINGS_SCHEMAS_PATH"
   
  +    wrapProgram "$out/bin/gnome-shell-extension-tool" \
  +      --prefix PYTHONPATH : "${python3Packages.pygobject3}/lib/python3.4/site-packages:$PYTHONPATH"
  +
       wrapProgram "$out/libexec/gnome-shell-calendar-server" \
         --prefix XDG_DATA_DIRS : "${evolution_data_server}/share:$out/share:$XDG_ICON_DIRS:$GSETTINGS_SCHEMAS_PATH"
   
  
positive.code: { fetchurl, stdenv, pkgconfig, gnome3, json_glib, libcroco, intltool, libsecret
  , python3, libsoup, polkit, clutter, networkmanager, docbook_xsl, docbook_xsl_ns, at_spi2_core
  , libstartup_notification, telepathy_glib, telepathy_logger, libXtst, p11_kit, unzip
  , sqlite, libgweather, libcanberra_gtk3
  , libpulseaudio, libical, libtool, nss, gobjectIntrospection, gstreamer, makeWrapper
  , accountsservice, gdk_pixbuf, gdm, upower, ibus, networkmanagerapplet, librsvg }:
  
  # http://sources.gentoo.org/cgi-bin/viewvc.cgi/gentoo-x86/gnome-base/gnome-shell/gnome-shell-3.10.2.1.ebuild?revision=1.3&view=markup
  
  
negative.code: 
    buildInputs = with gnome3;
      [ gsettings_desktop_schemas gnome_keyring gnome-menus glib gcr json_glib accountsservice
        libcroco intltool libsecret pkgconfig python3 python3Packages.pygobject3
        libsoup polkit libcanberra gdk_pixbuf librsvg
        clutter networkmanager libstartup_notification telepathy_glib docbook_xsl docbook_xsl_ns
        libXtst p11_kit networkmanagerapplet gjs mutter libpulseaudio caribou evolution_data_server
        libical libtool nss gobjectIntrospection gtk gstreamer makeWrapper gdm
  