The Haskell Platform (HP) is the blessed set of libraries and tools on which
to build further Haskell libraries and applications. It is intended to
provide a comprehensive, stable, and quality-tested base for Haskell projects
to work from.
This version specifies the following additional developer tools be installed,
for a system to be in full compliance:
* cabal-install
* alex
* happy
* haddock
WWW: http://haskell.org/platform/