{cabal, perl}:

cabal.mkDerivation (self : {
  pname = "alex";
  version = "2.3.2"; # Haskell Platform 2010.1.0.0
  name = self.fname;
  sha256 = "6715a4c27b15a74d8f31cbb6a7d654b9cb6766d74980c75b65dee7c627049f43";
  extraBuildInputs = [perl];
  meta = {
    description = "A lexical analyser generator for Haskell";
  };
})