hacky fix for rubygem-glib2
Failure: devel/rubygem-gobject-introspection v2.2.3
Failure: graphics/rubygem-gdk_pixbuf2 v2.2.3
Failure: x11-toolkits/rubygem-pango v2.2.3
Failure: devel/rubygem-cairo-gobject v2.2.3
Failure: accessibility/rubygem-atk v2.2.3