After reading everything was possible to read on setuptools and friends, I'm a bit confused... I have the following situation: suppose that there is a framework composed by many many eggs, which doesn't change very often. Then there are N applications using this framework, where every application is also composed by 2-3 eggs, and everything is run in a "funny" way (using Envisage). So at the moment every application fiddles around with the global easy_install.pth, which is bad and needs to be changed, and I have to figure out how. My idea would be to - have a global pypi-server running on localhost - every application is in a virtualenv (or buildout environment) and uses this local pypi-server I'm doing a few experiments, but already I'm not able to make my virtual env to fetch from my local pypi-server, what is the magic setting for that? The other future problems that I still see now are: 1. I have to be able to develop also the eggs from the framework 2. I have to make everything very simple to do from and Eclipse 3. These applications have to be shared on SVN, so maybe zc.buildout might be a better choice in this sense. Thanks a lot, Andrea