PyPI source dependencies?

[Aahz]

I'm trying to build PyObjC from source (because the binary doesn't work
on OSX 10.5) and I can't figure out how to get all the dependencies
downloaded automatically.  Am I missing something?
-- 
Aahz (aahz at pythoncraft.com)           <*>         http://www.pythoncraft.com/

import antigravity