pkg_resources.DistributionNotFound: The distribution was not found and is required by

I just spent some time chasing this error down. It seems to be caused by an interaction between stomp.py 7 vs 8, and the pip/pkg_resources handling of dependencies with a "." in their name.

My solution was to pin stomp.py to v7, but possibly we should be migrating this to v8 instead?
