{cabal}:

cabal.mkDerivation (self : {
  pname = "stm";
  version = "2.1.2.1"; # Haskell Platform 2010.2.0.0
  sha256 = "0d7d8babd2f07c726909030461e1f9b3aaf02dc809fd5e1c0509a67d23b784b8";
  meta = {
    description = "Software Transactional Memory";
  };
})