Locale::Maketext::Simpleが動かない

ja.po

msgid "hello"
msgstr "konnnitiwa"

lang.pl

use strict;
use warnings;

use Locale::Maketext::Simple {  Style  => 'gettext',  };

sub text {
  Locale::Maketext::Simple->import({Path => '.'});
  loc_lang('ja');
  return loc('hello');
}
print text, "\n";