00_main.pl

#!/usr/bin/env perl

use strict;
use warnings;

use cartonup;
use Plack;

cartonize.pm

package cartonize;

use strict;
use warnings;
use File::Basename qw(dirname);

sub import {
  my $package_dir = dirname(__FILE__);

  # stolen from Carton::CLI->cmd_exec v0.9.15
  my $carton_path = $ENV{PERL_CARTON_PATH} || "$package_dir/../../local";
  my $lib = "$carton_path/lib/perl5";
  require lib::core::only;
  require lib;
  lib::core::only->import;
  lib->import($lib);
}

1;

Makefile.PL

requires "Plack";