[Haskell-beginners] Cross-platform .hs files on Linux and Windows

I've been given a set of .hs files which contain the shebang line #!/usr/bin/env runhaskell and I would like them to work on Windows, but none of the Windows binaries seem to be able to process them without a :1:1: parse error on input `#!' These files came from a Linux machine, where they run without trouble. Is there any way I can get the Windows executables to run these files? I asked on IRC and it was suggested that I change the files to literate Haskell, but I'd rather have some way of having cross-platform operation which does not involve making changes to the scripts themselves. Is there something that can be done e.g. by using particular command line options or configuration settings? Thanks & regards, Vinay Sajip