Requirements for using and for building
The Glasgow Haskell Compiler. It works with GHC-7.8.3, and should also work with versions 7.8.0 upwards. Because of incompatible changes in GHC, it does not work with GHC-7.6 and older.
A Unix like system. HsShellScript is being developed and tested on Linux.
Requirements only for building
GHC and Haddock are included in the The Haskell Platform.