[[!comment format=mdwn username="spwhitton" avatar="http://cdn.libravatar.org/avatar/9c3f08f80e67733fd506c353239569eb" subject="comment 1" date="2018-08-24T23:12:17Z" content=""" The existing properties cannot do what you want. You are going to need to write a new one. Simplest implementation would be something that calls `apt-get install foo=1.2.3`. """]]