[Slackwise]

Well, you can specify extra packages using $GUIX_PACKAGE_PATH, and I've seen a few custom repos, such as this:

https://github.com/genenetwork/guix-bioinformatics

and

https://github.com/Ecogenomics/ace-guix

I'm not sure how easy it is to maintain a system with extra packages like this, but it'd be nice to be able to use an "overlay" repo as you can in Gentoo for personal/custom packages.

Would love to ping davexunit to see if he can elaborate, because I don't see any specific way to add repositories from the documentation.

[davexunit]

There's no such thing as a repository in Guix. Using GUIX_PACKAGE_PATH is the closest thing, conceptually.

[Slackwise]

Ahh, well, then it appears I have to manage a directory of packages myself, as well as any dependencies outside of the Guix store, right? Would be nice to just have a secondary source, as I do with MELPA for Emacs, or overlays for Gentoo.

Is something similar/comparable planned to be added?

Orrr should someone step forward and volunteer to add it as a feature...?