{ lib, config, ... }: let inherit (config.services) croc; in { networking.nftables.ruleset = '' table inet filter { chain input-net { tcp dport {${lib.concatMapStringsSep "," toString croc.ports}} counter accept comment "croc" } } ''; services.croc = { enable = true; pass = builtins.readFile croc/pass.clear; #debug = true; }; }