I think that's a mistake. You are using abandoned software: djbdns 1.05 was released in 2001. It even has a published security flaw from 2009, for which the $1000 guarantee was paid by DJB, and yet there is still no official release to fix the issue (there is a patch available from other sources).

There is a fairly healthy ecosystem of BIND alternatives these days, but djbdns is not one of them.