[exDM69]

> Cabal is probably the #1 thing keeping me from writing more Haskell code. I've had so many issues with conflicting versions of various libraries being required, and incredibly cryptic error messages upon failure.

Cabal has recently been causing problems because the fast pace of Haskell lib development and some big changes in the language and certain core libraries has been causing lots of incompatibility problems.

cabal-dev is a new tool, based on cabal, that will use a per-project virtual environment and should "fix" all the version incompatibility issues there have been. cabal-dev is similar to python's virtualenv, ruby's rvm and other similar tools.