In a related matter it behooves open projects to do a very clean build before they do a release. By that I simply mean they should take a source distribution o

In a related matter it behooves open projects to do a very clean build before they do a release. By that I simply mean they should take a source distribution of their project and perform a build with their repository caches cleared to ensure the project actually still builds in the wild. Dependencies can silently vanish behind the facade of a local proxy or cache.