Per this[1] conversation on IRC, there is an issue with ASDF being installed for SBCL while using GNU CLISP. It seems that when sbcl libraries are installed, there are also some files created in /etc/common-lisp/ that, by default, cause /any/ implementation of Common Lisp using ASDF to prefer the SBCL libraries. This can currently be worked around using an init file[2], but this is not a user-friendly situation. I am looking into a possible solution, but wanted to report the bug now in case someone else has more experience than me. [1]: https://logs.guix.gnu.org/guix/2022-07-04.log#214848 [2]: http://paste.debian.net/1246303/ -- Christopher Rodriguez