[Haskell-beginners] Problem installing lhs2tex

Hi, im trying to install lhs2TeX in Mac OS. But i got an error, that i dont know how to fix. Someone can explain me what i need to do to fix that. Is this error: " MacBook:lhs2tex-1.16 mgd$ make /opt/local/bin/ghc -O --make -o lhs2TeX Main.lhs [17 of 19] Compiling FileNameUtils ( FileNameUtils.lhs, FileNameUtils.o ) FileNameUtils.lhs:15:57: Module `System.IO' does not export `hSetEncoding' FileNameUtils.lhs:15:85: Module `System.IO' does not export `utf8' make: *** [lhs2TeX] Error 1 " Thanks, Miguel