In reply to@lunik1:lunik.one
I could have sworn when I did this that the nixos config immediately complained about nonfree packages, indicating the config had not been carried over. I will take another look.

{
  inputs = {
    flakelight = {
      url = "github:nix-community/flakelight";
    };
  };

  outputs = { flakelight, ... }:
    flakelight ./. {
      nixpkgs.config.allowUnfree = true;

      nixosConfigurations = {
        host = {
          system = "x86_64-linux";
          modules = [
            {
              boot.loader.grub.device = "/dev/sda";
              fileSystems."/" = {
                device = "/dev/sda";
                fsType = "xfs";
              };
              hardware.enableAllFirmware = true;
            }
          ];
        };
      };
    };
}

       Failed assertions:
       - the list of hardware.enableAllFirmware contains non-redistributable licensed firmware files.
         This requires nixpkgs.config.allowUnfree to be true.
         An alternative is to use the hardware.enableRedistributableFirmware option.