Common Lisp equivalent of virtualenv or rvm?
common-lisp
Solution
Management of software systems would be done by something like ASDF (define software systems and actions for them) and Quicklisp (downloading of software systems via central registration). AFAIK it does not deal with multiple versions of a software systems, such that you can say which version to load. Using different Lisps with the same library should work, since each Lisp usually has a different file type for compiled code (and/or uses a different directory for the compiled code).
Problem
Is there something similar to the Python utility virtualenv or Ruby utility rvm? I want to switch SBCL to Clozure CL, for example.