This is not a version of the package which came from the official Ubuntu archive.
$ rmadison flightgear-phi flightgear-phi | 2016.4.2+dfsg1-1 | artful/universe | source, all flightgear-phi | 2016.4.2+dfsg1-1 | bionic/universe | source, all
This is not a version of the package which came from the official Ubuntu archive.
$ rmadison flightgear-phi
flightgear-phi | 2016.4.2+dfsg1-1 | artful/universe | source, all
flightgear-phi | 2016.4.2+dfsg1-1 | bionic/universe | source, all