How to uninstall all cabal packages?

Hi! I want to remove eveything which cabal has installed, and begin again with a clean installation. How is this accomplished? I've deleted ~/.cabal, but it still says that hsshellscript is already installed: desktop ~ $ cabal install hsshellscript Resolving dependencies... All the requested packages are already installed: hsshellscript-3.4.3 Use --reinstall if you want to reinstall anyway. Bye V.W.