Before building new bind, I cleaned $DESTDIR.
Then failed like follows.

===========  4 missing files  ==============
Files in flist but missing from DESTDIR.
File wasn't installed ?
------------------------------------------
/usr/bin/dnsquery
/usr/libexec/dnskeygen
/usr/share/doc/smm/10.named
/usr/share/examples/named
========  end of 4 missing files  ==========