如何使用PHP ZipArchive :: addPattern添加相对路径？

Question

As simple as the title:

$zipFileName = $folderName . DIRECTORY_SEPARATOR . strtolower(sprintf('bundle_%s.zip', date('F_Y', strtotime('last month'))));

$zip = new \ZipArchive();
if ($zip->open($zipFileName, \ZIPARCHIVE::CREATE )!==TRUE) {
    throw new \Exception("cannot open <$zipFileName>
", 500);
}

$zip->addPattern('/\.csv$/', $folderName, ['remove_path' => $folderName]);
$zip->close();

This is creating a zip file with the path as the absolute path on the machine:

So I'm opening the resulting zip and having:

/tmp/bundle/file1.csv
/tmp/bundle/file2.csv
/tmp/bundle/file3.csv

But, I would like to get:

file1.csv
file2.csv
file3.csv

Not sure what else to try?