Hi Felix,

Felix Lechner <felix.lechner@lease-up.com> writes:
> $ command -v su
> /home/lechner/.guix-home/profile/bin/su

This is the crux of the issue here, it should be
/run/setuid-programs/su.  Are you on Guix system?  /run/setuid-programs/
should be at the top of your PATH.  The default /etc/profile should
ensure that, but if you do anything else with env variables it might get
shadowed.  I am not too sure of how guix home deals with this, you might
have to dig deeper there.

Best,
-- 
Josselin Poiret