TYPO3 Core

My uploads folder contains Giga bytes of data, so to save expensive SS storage I symlinked the folder to external NAS storage.

Upgrading from 4.5 to 6.2 going through the Install Tool the "Folder structure" section gives me the following error message:

/uploads is not a directory - Directory /uploads should be a directory, but is of type link

Going through the source code I found in \TYPO3\CMS\Install\FolderStructure\DirectoryNode:

protected function isDirectory() {
$path = $this->getAbsolutePath();
return (@is_link($path) && @is_dir($path));
}

The above gives me an error in the Install Tool - nevertheless it still works (of course). Should it not be possible to symlink any folder in TYPO3???