I see a couple unanswered questions related to this. We have the same issue. Our server has umask set to 22, but we need 2. Setting it in the console by sys.umask('2') works for a while, but when our sessions are restarted it seems that umask is reverted to 22. Our main issue is that quarto creates hidden files that lock other users out of building shared documents. Is there a solution to this issue?