Still compiling haskell. At least stage 0 is done and into stage 1. About 3.5 hours so far. 
Just get 13.10, I think Haskell platform missed the Ubuntu 12 release and it causes major pain.
apt-get install haskell-platform
cabal update
cabal install cabal-install # gets 1.18v
Add this line to the bottom of .profile
PATH="$HOME/.cabal/bin:$PATH"
Check cabal --version
Done.