As someone who tried RVM for a while and until it's problems became obvious, and lived (very successfully) with rbenv as an escape for a long time afterwords, I

As someone who tried RVM for a while and until it's problems became obvious, and lived (very successfully) with rbenv as an escape for a long time afterwords, I have been liking chruby: https://github.com/postmodern/chruby https://github.com/postmodern/chruby It doesn't have most of the problems of RVM/rbenv, and mainly provides an easy way to switch between rubies while leaving everything else as full-path references instead of the "magic" tht RVM tries to provide. That said, I really like the local $GEM_HOME method, and guix sounds like an interesting solution.