When I list my current Guix garbage collection roots I find a root that I want to remove, the last one which belongs to a project I no longer develop.
$ guix gc --list-roots /var/guix/profiles/per-user/rovanion/current-guix-30-link /var/guix/profiles/per-user/rovanion/current-guix-30-link /var/guix/profiles/per-user/rovanion/guix-profile-133-link /var/guix/profiles/per-user/rovanion/guix-profile-133-link /var/guix/profiles/per-user/rovanion/current-guix-30-link /home/rovanion/source/python/a-project/.direnv/.guix-profile Reading the manual page Invoking guix gc I find instructions on how to add additional roots but nothing on how to remove them.