{cabal}:

cabal.mkDerivation (self : {
  pname = "stm";
  version = "2.1.1.2"; # Haskell Platform 2009.0.0
  sha256 = "68d550067ae180373142c51f3fa14bdf0a1516310aee9a37e28f9ac7cf3b8c6d";
  meta = {
    description = "Software Transactional Memory";
  };
})