[http://www.haskell.org/ Haskell] is a pure functional language.

Haskell Packaging

http://www.haskell.org/cabal/

Debian Haskell

[http://urchin.earth.li/~ian/haskell-policy/ Haskell Policy]
[http://urchin.earth.li/mailman/listinfo/debian-haskell debian-haskell mailing list]
[http://www.n-heptane.com/nhlab/repos/cabalDebianTemplate/ An another example] of how to package a Haskell library using dh_haskell
#debian-haskell IRC channel on OFTC