{...}: {
  networking = {
    interfaces = {
      enp1s0.ipv4.addresses = [
        {
          address = "192.168.1.30";
          prefixLength = 24;
        }
      ];
    };

    defaultGateway = {
      address = "192.168.1.1";
      interface = "enp1s0";
    };
    nameservers = ["1.1.1.1" "8.8.8.8"];
  };
}