{ fetchurl }:

fetchurl {
  url = "https://github.com/commercialhaskell/all-cabal-hashes/archive/6a869307fd58b59579f78e5631b9bc8ae6b9bb92.tar.gz";
  sha256 = "1i6gg49gibbqgc0iq87qlf6cqmi67pk8y2zbiz3gynqzrcmqbhfd";
}