[Haskell-cafe] Cabal - how do I remove a package?

As it says in the subject, how do I remove a package that I installed (with the --user flag) via cabal? Come to that, how do I list the packages I've installed via cabal? cabal list --installed includes all the GHC standard library (which I didn't install) and it doesn't seem to support a --user flag to list per-user installed packages. FWIW, I'm on Windows 7. Thanks, Paul.