nixos-hardware/lenovo/thinkpad/z13/default.nix

{
  assertions = [
    {
      assertion = true;
      message = ''
        Lenovo Z-series received a second generation so the hardware configuration has been split by generation. For the Z13 Gen 1 config, change from `lenovo-thinkpad-z13` to `lenovo-thinkpad-z13-gen1`.
      '';
    }
  ];
}