nix-config/modules/users/nixbuilder.nix

{ inputs, ... }:
let
  user = "nixbuilder";
in {
  nix.settings.trusted-users = [ user ];
  users.users.${user} = {
    createHome = false;
    home = "/var/empty";
    isNormalUser = true;
    openssh.authorizedKeys.keys = import inputs.self.modules.keys.nixbuilder;
  };
}