{ sources, ... }: let dns = import sources.dns-nix { }; in { services.nsd = { enable = true; zones = { "beta.dgnum.eu" = { # provideXFR = [ ... ]; # notify = [ ... ]; data = dns.lib.toString "beta.dgnum.eu" (import ./beta.dgnum.eu.nix { inherit dns; }); }; }; }; networking = { firewall = { allowedUDPPorts = [ 53 ]; }; }; }