Tried to package a python program directly in N900 but got an error.

traceback (most recent call last):
File "build_fSchedule.py", line 54, in <module>
p[real_dir] = fake_file
File "/usr/lib/python2.5/site-packages/py2deb.py", line 90, in __setitem__
raise Py2debException("key path '%s' malformed (don't start with '/')"%path)
py2deb.Py2debException: key path '' malformed (don't start with '/')

Did everything that was written here: http://wiki.maemo.org/Py2deb
Is that information valid for fremantle?
Or is there something more to to?