$stamp = "libraries/stamp/$package";
if ((! -d "libraries/$package") || (! -f "$stamp")
|| ((-M "libraries/stamp/$package") > (-M $tarball))) {
$stamp = "libraries/stamp/$package";
if ((! -d "libraries/$package") || (! -f "$stamp")
|| ((-M "libraries/stamp/$package") > (-M $tarball))) {