rubygems/rubygems — pull request #970 by mscherer (2014-07-09 16:47:23+00:00)
Title: File.rename won't work across partitions, snd return EXDEV

This errors poped up as I was trying to have /usr/local/share/gems shared
accross docker container for persistence.

To reproduce, try this ( with a docker container with ruby and all that is needed to build atomic ):

docker run -d -v $(pwd)/.gemcaches:/usr/local/share/gems fedora gem install rubygem