Failure to build gem from github.

[moxie]

I have done:
gem sources -a http://gems.github.com
gem install tobi-liquid

ERROR: could not find gem tobi-liquid locally or in a repository

The documentation on http://gems.github.com/ says:
If your gem isn't showing up, double-check that your 'RubyGem' checkbox is checked on your repo, it's really easy to forget this step.

Possible you've forgot this step? Or is this isolated?