[Haskell-cafe] building HUnit and other packages on Windows cygwin ...

Hello, I believe that HUnit has absolutely not other package dependencies. When I do a "runhaskell Setup.hs build", I get the following error message: gcc: installation problem, cannot exec `cc1': No such file or directory. I am not sure what "cc1" is? A pass/phase of the gnu gcc compiler? Kind regards, Vasya