Comment 4 for bug 791622

Revision 1531 changed the way yama.py gets the system folders are read. Instead of os.environ["XDG_DATA_DIRS"].split(":"), it uses [glib.get_user_data_dir()] + list(glib.get_system_data_dirs()).

The glib module used in maverick is 2.26.1 according to glib.__dict__. That one has get_user_data_dir(), but not get_system_data_dirs(), so yama.py goes [x_x].