Hello all I don't know if this helps at all, but for a GHC 6.12.1 installed from the ghc-installer rather than HP I get: Cygwin prompt on WinXP... $ ./haddock.exe --print-ghc-libdir C:\ghc\ghc-6.12.1\bin\..\lib There is actually no corresponding *lib* directory, but haddock still works fine. Best wishes Stephen