
This hasn't been needed for a long time, even when `mutableUsers = false`. Setting a uid manually is potentially risky since it could collide with non-declarative user accounts. (We do check for collisions between declarative accounts.)
*** NixOS *** NixOS is a Linux distribution based on the purely functional package management system Nix. More information can be found at http://nixos.org/nixos and in the manual in doc/manual.