{cabal}:

cabal.mkDerivation (self : {
  pname = "transformers";
  version = "0.2.2.0"; # Haskell Platform 2011.2.0.0
  sha256 = "1nkazxy2p0w5ad76vg1lc4l0nla1kdqjdf9pymjgk75dpiyijbdz";
  meta = {
    description = "Concrete functor and monad transformers";
  };
})