pygtk does not work without pygobject (AFAIK it is a main part of the pygtk project). So please add it to the .dep file.
The README in source tarball says ...
Quote:
Requirements
============
* C compiler (GCC and MSVC supported)
* Python 2.3.5 or higher
* PyGObject 2.12.1 or higher
* Glib 2.8.0 or higher
* GTK+ 2.8.0 or higher (optional) or
GTK+ 2.10.0 or higher for 2.10 API
GTK+ 2.12.0 or higher for 2.12 API
GTK+ 2.14.0 or higher for 2.14 API
* libglade 2.5.0 or higher (optional)
* pycairo 1.0.2 or higher (optional)
* Numeric (optional)
Additiionally, i would appreciate if libglade and pycairo are at least in a .sug file mentioned. You would get a similiar result with depfinder.
Background: avahi requires definitely pygobject, libglade and pycairo installed. And there is some other problem that is really strange for me, pygtk does not work in Salix Core, there is no gdk module available, although pygobject, pycairo and libglade installed.