{ lib, config, ... }: { options.ips = lib.mkOption { type = lib.types.attrs; default = {}; }; config.ips = rec { netInt = "eno1"; localSpan = "10.0.0"; server = "${localSpan}.2"; pc = "${localSpan}.3"; vm = "${localSpan}.4"; hx = "${localSpan}.70"; }; }