Bug with unicode characters in file names

Hi This is some file "äöü.hs" with three German umlauts in the file name: main = putStrLn "äöü" Now I want to get the dependendency information. Therefore I call: ghc -M äöü.hs The following gets added to the Makefile: # DO NOT DELETE: Beginning of Haskell dependencies äöü.o : äöü.hs # DO NOT DELETE: End of Haskell dependencies The umlauts get transformed from three UTF-8 encoded characters (six bytes) to six UTF-8 encoded characters (twelve bytes). I'm sending this to glasgow-haskell-users instead of glasgow-haskell-bugs, because the latter does not seem to accept my messages. I receive nothing, neither the message in the mailing list, nor any error message. Bye, V.W.