What would be really handy at this point is a shim around Nix to make it trivial to manage ruby versions without having to learn a whole new ecosystem.  I don&#x27;t want to learn Nix, I want to use Ruby.<p>Actually, that would have been really handy about 5 years ago, but the point stands: the problem with general tools like Nix is that you need a popular, specific application of them to get them across the chasm.  Not only would a wrapper script using Nix to manage ruby versions be actually useful, it ought to be relatively easy to repurpose to node, elixir, elm, GHC, whatever.  Make it so that I don&#x27;t need to care that I&#x27;m using Nix in the background, and I&#x27;m actually more likely to use it.