nixos-config/users/jill.nix

{pkgs, ...}: {

  # Define a user account. Don't forget to set a password with ‘passwd’.
  users.users.jill = {
    isNormalUser = true;
    description = "Jill";
    extraGroups = [ "networkmanager" "wheel" "docker" ];
    shell = pkgs.fish;
  };

}