Parse error on '#'

Hi, I'm trying to get GHC working on Mac OS X 10.2. I downloaded and installed the binary distribution of GHC 6.0.1, and it seems to compile the 'hello world' application. However, when i try to compile another program (e.g. GHC 6.0.1 itself), it seems that GHC doesn't recognize '#ifdef' statements in code, and reports back with the error: Package.hs:1: parse error on input `#' Can anyone tell what's going on here ? thanks, Remko