[Haskell-beginners] debugging help

I'm getting an error, printf not having enough arguments. I need to find where this is happening, and I understand there are ways of getting a stack trace, but apparently I need to compile for profiling. That means I need to compile my one library dependency (Text.XML.Light) for profiling, I believe. How do I do this? I'm on Windows and have only installed libraries in the past with cabal. D