$eml->header_set('Message-ID', '<k@y>');
$in = 'From k@y Fri Oct 2 00:00:00 1993'."\n".$eml->as_string;
-lei_ok([qw(import -F mboxrd -)], undef, { %$lei_opt, 0 => \$in },
+lei_ok([qw(import -F mboxrd /dev/fd/0)], undef, { %$lei_opt, 0 => \$in },
\'import single file with --kw (default) from stdin');
lei(qw(q m:k@y));
$res = json_utf8->decode($lei_out);