bug#36379: Running `guix pull` as "root" user

[Raghav Gururajan]

Hello Guix!

On a newly installed Guix System, before running first `guix pull`, the
output for `which guix` and `hash guix` for both "root" and "regular"
user are `/run/current-system/profile/bin/guix`. This is okay.

After running first `guix pull` as "regular" user, the output for
`which guix` and `hash guix` for that "regular" user are always
`/home/rg/.config/guix/current/bin/guix`. This is okay.

But after running first `guix pull` as "root" user, the output for
`which guix` and `hash guix` for that "regular" user are always
`/run/current-system/profile/bin/guix` instead of being
`/root/.config/guix/current/bin/guix`. This is a bug?

Thank you!

Regards,
RG.