
As the only consequence of isSystemUser is that if the uid is null then it's allocated below 500, if a user has uid = something below 500 then we don't require isSystemUser to be set. Motivation: https://github.com/NixOS/nixpkgs/issues/112647
Moved to: ./contributing-to-this-manual.xml. Link: https://nixos.org/manual/nixos/unstable/#chap-contributing