This use case is filled for me by Gentoo's portage (https://wiki.gentoo.org/wiki/Overlay https://wiki.gentoo.org/wiki/Overlay) Currently I'm looking into what

This use case is filled for me by Gentoo's portage (https://wiki.gentoo.org/wiki/Overlay https://wiki.gentoo.org/wiki/Overlay) Currently I'm looking into what Guix and Nix can offer me wrt. custom packages.