For something even simpler, check out redenv -- https://github.com/damballa/redenv https://github.com/damballa/redenv . It tries to provide something which wor

For something even simpler, check out redenv -- https://github.com/damballa/redenv https://github.com/damballa/redenv . It tries to provide something which works more like Python's virtualenv, just doing the minimum necessary to setup an environment referencing a particular system-provided Ruby installation, but with an isolated gemset.