Is there a method to find out if a package is to be installed with distutils instead of setuptools?

Question

I can look inside setup.py I suppose to see if it's a distutils package. But in the process of familiarizing myself with python package management I have noticed that there seems to be more than one way to do it. So:

How can I check an unzipped packages directory or setup.py to see how to build it?

EDIT: When I say 'build' I mean is it going to use distutils or setuptools, or distribute. I am using buildout.

Answer 1

Why do you need to know? What's wrong with just running

/path/to/your/python setup.py install

?