Thanks for the clarification and info.
From this I then deduce: Using "cabal install" is dangerous, and leads to broken package structure (inconsistent package versions and shadowing). Better to use cabal-dev, But it requires network, which is external to Haskell, and a pain to build (on windows)...
Thus, no good solution on Windows - is this right? Since Windows is 94%+ of computing environments today (all of our labs use Windows, and "standard" IDEs), then Haskell is not a good fit? We want to use Windows since that is what students will generally see in their professional environments. I hope not...!! :-) -------------------------------------------------------
Ahh, I think network is a pain to build on Windows. I don't as a rule do any haskell on windows because of the headaches of msys / mingw.