Re: Cabal and simultaneous installations of the same package

I am already planning to do a GSoC project based on it with a slightly larger aim. You can find my work in progress proposal at https://gist.github.com/fugyk/37510958b52589737274. Also I have written a patch to make cabal non-destructive at https://github.com/fugyk/cabal/commit/45ec5edbaada1fd063c67d6109e69efa0e732e.... Can you review the proposal and give me suggestions.