package builder::custom;
use strict;
use warnings;
use warnings FATAL => qw(recursion);
use parent qw(Module::Build);

sub new {
  my ($class, %args) = @_;
  die "OS Unsupported: " . $^O if ($^O !~ m#(?i)(Linux|darwin)#);
  print $^O;
  return $class->SUPER::new(%args);
}
1;