Compiling via setuptools

When I use the next command in my home system:

  $ python setup.py develop

Pyrex compiles the '.pyx' file without any problem. But after of
uploading it to Pypi, and when is installed via 'easy_install' it
doesn't builds any more. (I had to upload the '.c' file compiled on my
system)

You can see here how has been configured:
http://www.bitbucket.org/ares/bcryptwrap/src/tip/setup.py

and here where I had to add any files:
http://www.bitbucket.org/ares/bcryptwrap/src/tip/MANIFEST.in