[Haskell-cafe] UTF-8 Strings and GHC

Hi, all. I'm writing a GUI app using Haskell and Gtk2HS. All goes well besides one thing. I need to display some messages in russian and I can't figure out, how to handle that. Gtk uses UTF-8 internally, so i have to pass UTF-8 strings to it somehow. But how to define them in source file? I get "lexical error in string/character literal" message then compiling using GHC-6.4.1. I tried to bypass it by using koi8-r in sources and converting strings to UTF-8 on the fly using ffi binding to iconv I found in MissingH (iirc). Works fine on Linux though is a little awkward, but I get wried results on Win32. Is there any way to use unicode strings in sources?