It is postfix's resolvconf-hook-script (/etc/resolvconf/update- libc.d/postfix) which causes the failure. See also #437783.
** Package changed: bind9 (Ubuntu) => postfix (Ubuntu) -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/980682 Title: package bind9 1:9.8.1.dfsg.P1-3 failed to install/upgrade: subprocess installed post-installation script returned error exit status 1 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/postfix/+bug/980682/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs