Namespace package zope cannot find modules during testing #870
Description
In Nixpkgs we recently updated setuptools from 26.1.1 to 28.8.0 (and the issue also occurs with the latest 30.2.0). This seemed to break the testing of several zope modules for us. The modules do actually work, its just that when running python setup.py test we get import errors. Note that at this point we populate PYTHONPATH with all the dependencies. Any idea what could have caused this?