As a quick work around the 18.04 package installs fine on 17.10
https://launchpad.net/ubuntu/+archive/primary/+files/ack_2.18-2_all.deb
As a quick work around the 18.04 package installs fine on 17.10
https:/ /launchpad. net/ubuntu/ +archive/ primary/ +files/ ack_2.18- 2_all.deb