Thank you. This did in fact install with cpanm after your update, I thought it hadn't worked because repeating the install command re-installed it.
A similar package to compare with might be
Ack.
In other news, there is already an installed program called pl:
$ man pl
NAME
pl – ASCII property list utility
SYNOPSIS
pl [--input file] [--output file]
DESCRIPTION
pl can be used to check the syntax of old-style ASCII property li
+st files.
...
I'm not sure what the best practice is for dealing with name clashes like this. Perhaps giving it a non-clashing name and leaving it up to the user to make a shorter alias ...