We migrated off of localshop and onto devpi. Devpi is a much better product and much more actively maintained. localshop was nothing but headaches and constantly breaking.
Author here: I created it to solve an issue I was running into a couple of years ago. I've only recently started using it again myself. I think the development version (not on pypi) is in much better shape with things like multiple repositories and better user management (teams).
Maybe you use more esoteric features. The only thing I've done in the last 18 months is patch a bug that prevented uploads from Python 2.7.4-2.7.10. We just run it under circus with chaussette and front it with an elb.