[Distutils] package made up of only .so's?

Hi All, I need to build a package which is made up of a set of .so's. These .so's are compiled elsewhere, so I just need to write an appropriate setup.py and bdist_wheel to get what I want. But that first part is where I'm struggling. Each of these .so's is essentially a top level python module. How do I tell setuptools' setup() function to basically just roll these into a wheel? Any help gratefully received! Chris