$ cpan
...
cpan[1]> install PAR::Packer
... various messages including installation of dependencies ...
  RSCHUPP/PAR-Packer-1.039.tar.gz
  /usr/bin/make install  -- OK

cpan[2]> q
...
$ which pp
/Users/ken/perl5/perlbrew/perls/perl-5.26.0t/bin/pp