I try to use propellor to deploy a secondary DNS server.

In your configuration, I see nothing to change the listen-on {; }; option, did I miss something?

Also, in Dns.secondaryFor, I do not know how to set confLines to something else, should I use this function and peel the result until I can change this or shoud I add a Dns.secondaryFor' version with an extra argument?

By the way, is it really advisable to use a "minimal config" instead of a full clone?