Hi, it appears that ghc (and ghci) create temporary files in /tmp during the un-lit phase, at least. It would be nice, if ghc would ... - create those files with read/write permission for the owner only, 0600. - set-up some atexit(3) job, or whatever, to make sure those files _are_ deleted when ghc exits. It might even be possible to create the file and then remove(3) it, right away. The file handle will continue to work, but there is never an entry in the file system. Just a suggestion. :-) Peter