no 'ruby version manager', eg 'chruby, rvm, or rbenv' make any sense in the nix/guix world. the article would have done a disservice to itself to go into detail on each one, when the goal was really to show how to manage ruby projects in guix.
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:
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.
Thank you. I think the benefits of Guix start to become even more evident when you work in a multi-language environment with god knows how many package managers. We don't yet have all the packages that people need, but that will happen in time if other people see value in Guix. We will see.
