TL;DR: It's not any different and, to the extent that language-specific package managers contain non-free software, this same issue is raised and should be addressed. As you can see from the mailing list Guix is on it.
There was a discussion of that on the gnu-linux-libre mailing list. The
thread was "programming language package manager" if anyone wants to read it.
- Re: [Trisquel-users] SNAP, a door to non free softw... calmstorm
- Re: [Trisquel-users] SNAP, a door to non free softw... alonivtsan
- Re: [Trisquel-users] SNAP, a door to non free ... Adonay Felipe Nogueira
- Re: [Trisquel-users] SNAP, a door to non free ... jason
