cloudfoundry/bosh — pull request #265 by TieWei (2013-06-09 04:41:56+00:00)
Title: Fix libyaml not found error

The issue is described here https://github.com/cloudfoundry/bosh/issues/264

Without psych enabled, the migrate work will failed.

My solution is compile and install libyaml before ruby, then all things will work correctly