{ fetchurl }:

fetchurl {
  url = "https://github.com/commercialhaskell/all-cabal-hashes/archive/0986b1ed62a71528e09a660493955d79f0bf2fbf.tar.gz";
  sha256 = "1s8xffqpkwv1x038mi1vw0rk6k3scwpp2l1phq9zs2vxrhblriaw";
}