[Haskell-cafe] Problematic fixed "stack ghci" temporary script (parent) directory

When I run "stack ghci", an attempt is made to create a temporary directory named: /tmp/haskell-stack-ghci/<unique-subdir> in which various temporary artefacts are stored. The parent directory is created with permissions (0777 & ~umask). Security issues aside, this can't work reliably on a multi-user system. Does anyone know whether this is something peculiar to my FreeBSD setup, or a systemic issue with "stack ghci"? I don't see the same behaviour with "stack script", though if I create a script to run in "/tmp", then ghc is, somewhat unexpectely, executed with "-i/tmp/", which also has security implications... -- Viktor.