{ self, ... }: {
  config.flake.factory.user = { username, isAdmin }: {
    nixosModules.${username} =  { lib, ... }:
    let home = "/home/${username}"; in {

      users.users.${username} = {
        isNormalUser = true;
        home = home;
        extraGroups = lib.optionals isAdmin [ "wheel" ];
      };
    };

    darwinModules.${username} =  { lib, ... }:
    let home = "/Users/${username}"; in {

      users.users.${username} = {
        home = home;
      };

      system.primaryUser = lib.mkIf isAdmin "${username}";
    };
  };
}