sub can_run {
  my ($cmd) = @_;

  return $cmd if -x $cmd;
  if (my $found_cmd = MM->maybe_command($cmd)) {
    return $found_cmd;
  }

  for my $dir ((split /$Config::Config{path_sep}/, $ENV{PATH}), '.') {
    next if $dir eq '';
    require File::Spec;
    my $abs = File::Spec->catfile($dir, $cmd);
    return $abs if (-x $abs or $abs = MM->maybe_command($abs));
  }

  return;
}
