bind9 package in Ubuntu 18.04 PPA can't be installed
Summary
When attempting to install a bind9 package from ISC's PPA on Ubuntu 18.04, the installation fails due to a dependency issue.
(reported by a user to info@isc.org)
BIND version used
bind9 - 1:9.18.7-1+ubuntu18.04.1+isc+1
Steps to reproduce
# add-apt-repository ppa:isc/bind
# apt install bind9
What is the current bug behavior?
# apt install bind9
Reading package lists... Done
Building dependency tree
Reading state information... Done
Some packages could not be installed. This may mean that you have
requested an impossible situation or if you are using the unstable
distribution that some required packages have not yet been created
or been moved out of Incoming.
The following information may help to resolve the situation:
The following packages have unmet dependencies:
bind9 : PreDepends: init-system-helpers (>= 1.54~) but 1.51 is to be installed
E: Unable to correct problems, you have held broken packages.
What is the expected correct behavior?
bind9 package is installed