haskell: output non-ascii characters

I'd like to output non-ascii characters in WinGHCi, but this is what I get:

Prelude> "δ"
"\948"
Prelude> putStr "\948"
*** Exception: <stdout>: hPutChar: invalid argument (character is not in the code p开发者_运维知识库age)

I am using WinGHCi 7.0.3 on windows xp. What do I have to do so that WinGHCi prints a nice little delta?

Works on OSX!

Prelude> putStrLn "\948"
δ

Sounds like this is a windows problem with nothing to do with haskell...

This is a WinGHCI bug. Use GHCI (the console, non-GUI version).

UPD: this is apparently not entirely correct (works for me with Greek letters and not e.g. Cyrillic).