{ fetchurl }:

fetchurl {
  url = "https://github.com/commercialhaskell/all-cabal-hashes/archive/a82d2463451cfd47772b3fb331b1a0e8386675ef.tar.gz";
  sha256 = "0l2h2z0982nmw3kq9r6ppwgs7ar4bda9c808mc2nkcyfmcnkdl6w";
}