FreeBSD: bind9 named[59807]: the working directory is not writable

To fix this error, edit the following file:

/etc/mtree/BIND.chroot.dist

and change:

/set type=dir uname=root gname=wheel mode=0755

into:

/set type=dir uname=bind gname=wheel mode=0755

and then restart service:

# /etc/rc.d/named restart