anchor.diff:        defaultIconTheme sqlite gnome3.gnome-bluetooth
         libgweather # not declared at build time, but typelib is needed at runtime
         gnome3.gnome-clocks # schemas needed
  -      at_spi2_core upower ibus gnome_desktop telepathy_logger gnome3.gnome_settings_daemon ];
  -
  -  propagatedBuildInputs = [ python3Packages.pygobject3 python3Packages.python gobjectIntrospection ];
  +      at_spi2_core upower ibus gnome_desktop telepathy_logger gnome3.gnome_settings_daemon
  +      pythonEnv gobjectIntrospection ];
   
     installFlags = [ "keysdir=$(out)/share/gnome-control-center/keybindings" ];
   
  
positive.code:       --set GDK_PIXBUF_MODULE_FILE "$GDK_PIXBUF_MODULE_FILE" \
        --prefix XDG_DATA_DIRS : "${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}/${python3Packages.python.sitePackages}:$PYTHONPATH"
  
      wrapProgram "$out/libexec/gnome-shell-calendar-server" \
        --prefix XDG_DATA_DIRS : "${evolution_data_server}/share:$out/share:$XDG_ICON_DIRS:$GSETTINGS_SCHEMAS_PATH"
  
negative.code: 
  # 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
  
  let
    pythonEnv = python3Packages.python.withPackages ( ps: with ps; [ pygobject3 ] );
  in stdenv.mkDerivation rec {
    inherit (import ./src.nix fetchurl) name src;
  
    # Needed to find /etc/NetworkManager/VPN
  