I was looking at a NixCon 2019 session called "Guix from the Nix Perspective" (https://www.youtube.com/watch?v=bDGzCXr6VYU).

I am wondering why Guix chose `/var/guix` path instead of `/gnu/var/guix` or `/guix/var/guix`, as Nix uses `/nix/var/nix`?

I do think that having only one or two directories under root, `/gnu` and/or `/guix` is better, instead of having Guix related files under multiple directories (/var, /run etc.). It will be neat, clean and unique.