[Haskell-beginners] apt cabal hackage

Can anyone point me to a tutorial or howto on haskell package management under debian/ubuntu? Some of the things that are making my head spin... How when to use hackage/cabal? And when apt? How to translate haskell internal names (ie names given to import) to package names ie either cabal or apt names? Global (/usr) vs local (under $HOME) packages and figuring out paths Thanks