Hardlinking to $HOME/Library/Mobile Documents/com~apple~CloudDocs

How can the directory ~/Library/Mobile Documents/com~apple~CloudDocs be hardlinked to the directory `~/iCloud? The [suggested answer](https://apple.stackexchange.com/q/219549) to this question, based on the following command

gln -d  /Users/mpf/Library/Mobile\ Documents/com\~apple\~CloudDocs iCloud

throws this error on Sonoma 14.0:

gln: failed to create hard link './iCloud' => '/Users/mpf/Library/Mobile Documents/com~apple~CloudDocs': Operation not permitted

What is the correct approach?