'repo is stuck' when Gemfile references locally build gems

[digitaltom]

In our Gemfile, we have this line: gem 'edgecast', '~> 0.2.suse', require: 'edgecast/token'.
It references a version of a Rubygem that is not available on rubygems.org, but build locally.

Since about a week depfu.com stopped working, showing an error about above issue:

What's the best way to overcome this? Would it help if we use another name for the gem?
A feature like #35 could help us to workaround that issue.