{ fetchurl }:

fetchurl {
  url = "https://github.com/commercialhaskell/all-cabal-hashes/archive/e6e8a920e43237ccd2f66d6a349b5932a5eba1f5.tar.gz";
  sha256 = "0xyw1a5fp6swyxsj79hihivq9fpzzvl4apv34399a1n4ch6qhbf3";
}