Revert "Merge pull request #1 from theodi/bugfix-use-right-ruby-and-gemset"

This reverts commit d2458f6c18cfbe28b47585e6aba08def506b2f7c, reversing
changes made to edbd66a56bdb83b65ad04a2aa0918bbcc68c9169.
Merge pull request #2 from theodi/bugfix-roll-back

Revert "Merge pull request #1 from theodi/bugfix-use-right-ruby-and-gemset"