{
  lib,
  pkgs,
  host,
  ...
}:
{
  imports = [
    ./boot.nix
    ./ld.nix
    ./services.nix
    ./nvidia.nix
  ];
  config.networking.hostName = host.name;
  # make 'shared.darwin' not an error to define.
  options.shared.darwin = lib.mkOption {
    type = lib.types.anything;
    default = { };
    description = "no-op on linux";
  };
}