Use APT pinning for Puppet Labs sources to override distro packages

TL;TR

cat >/etc/apt/preferences.d/puppetlabs.pref <<EOF

Package: *

Pin: origin apt.puppetlabs.com

Pin-Priority: 1001

EOF

This report is in regards to Debian Bug #827867 (https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=827867) reported by rw or thrnio (not sure which of the accounts is active).

Based on the mail chain, the maintainer has no time. Now, there is a soft freeze of Debian stretch => unlikely there would be a fix. So, the problem may span to Ubuntu later.

As a Debian user, my suggestion is to enforce APT pinning inside puppetlabs-release-pc1-${codename}.deb as shown in the beginning.
More info on pinning: https://wiki.debian.org/AptPreferences