nixos/modules/services/networking/domains.nix

   1 {pkgs, lib, config, system, ...}:
   2 let inherit (lib) types;
   3 in {
   4 options.networking = {
   5   domainBase = lib.mkOption {
   6     type        = types.str;
   7     description = "Base network name.";
   8     example     = "example";
   9   };
  10 };
  11 }