ii  ghc                                                         7.10.3-7                                                    amd64        The Glasgow Haskell Compilation system
ii  libghc-exceptions-dev                                       0.8.0.2-3build1                                             amd64        extensible optionally-pure exceptions
ii  libghc-extensible-exceptions-dev                            0.1.1.4-6                                                   amd64        Compatibility layer for exceptions
ii  libghc-ghc-mtl-dev                                          1.2.1.0-4build3                                             amd64        an mtl compatible version of the Ghc-Api monads
ii  libghc-ghc-paths-dev                                        0.1.0.9-7                                                   amd64        Knowledge of GHC's installation directories
ii  libghc-mtl-dev                                              2.2.1-2                                                     amd64        Haskell monad transformer library for GHC
ii  libghc-stm-dev                                              2.4.4.1-1                                                   amd64        Haskell Software Transactional Memory library for GHC
ii  libghc-transformers-compat-dev                              0.4.0.4-5                                                   amd64        small compatibility shim for older versions of transformers.