No module named gobject

Пытаюсь запустить sonata:

$ sonata
Traceback (most recent call last):
  File "/usr/bin/sonata", line 28, in <module>
    import sonata
  File "/usr/lib/python2.5/site-packages/sonata.py", line 30, in <module>
    import gobject
ImportError: No module named gobject

Пакеты pygobject, pygtk, pycario установлены. Slackware 12.