At least on Ubuntu 22.04, the Nix installer creates `/etc/profile.d/nix.sh`, not `/etc/profile/nix.sh`.
`sudo systemctl disable nix-daemon.socket nix-daemon.service` removes these files already.
placed in a subsection of the binary install, the instructions are hard to find. putting them in a separate page that is shown in the table of contents should make it easier for users to find what they need when they need it.
