>I went ahead and just updated all of /usr/src/usr.sbin/bind and
>- BINGO! - it built!

Excellent.  Sorry, I should have clued in about the usr.sbin/bind
part earlier, given that's where the build is initiated (and I'd built
it myself twice), a little refresher for me.

>I'll go ahead and file a PR on this.
>
>Thanks for solving this mystery!

Glad I could help.

Dave