gitlabhq/gitlabhq — pull request #668 by arthurschreiber (2012-04-12 16:05:48+00:00)
Title: Add libyaml-dev to the apt-get install string.

If libyaml headers are not installed, YAML will not be correctly compiled (either not at all, or using Syck instead of Psych).

This caused some weird YAML serialization errors for me when creating merge requests in gitlab.