Gem::InstallError: opengl requires Ruby version >= 1.9.2.
An error occurred while installing opengl (0.8.0), and Bundler cannot continue.
Make sure that `gem install opengl -v '0.8.0'` succeeds before bundling.
root@ProtoType2:/opt/gltail/bin# ruby -v
ruby 1.9.3p194 (2012-04-20 revision 35410) [arm-linux-eabihf]