It’s somewhat annoying that Guix is falling out of being packaged by distros. For some more context, see https://lwn.net/Articles/1035491/.
However, it is likely that the Guix package manager will soon be removed from the repositories for Debian 13 and Debian 12 (“bookworm”, also called oldstable).
This seems to be happening. You can’t apt install guix using the current release of Debian. https://packages.debian.org/search?keywords=guix. Guix is not going to be included in next release of Ubuntu (25.10): https://packages.ubuntu.com/search?keywords=guix.
Looking at https://aur.archlinux.org/packages/guix, comments over the last few months seem to indicate that the build is broken.
A 1.5.0 release is planned for sometime in January 2026: https://codeberg.org/guix/release-planning/wiki/release-1.5.0-project/. So hopefully the situation is going to improve in future.