You need a Haskell system supported by C->Haskell. Currently, this is only
the Glasgow Haskell Compiler (GHC), which you can obtain from http://haskell.org/ghc/. Furthermore, you need the Haskell package
system Cabal. See the INSTALL
file for details on supported versions.
To build the documentation, you will also need the SGML Tools, which you find at your nearest sunsite or Linux mirror or at ftp://ftp.lip6.fr/pub/sgml-tools/. On an up-to-date Linux system, the tools are probably already installed.