{ fetchurl }:

fetchurl {
  url = "https://github.com/commercialhaskell/all-cabal-hashes/archive/1aad60ed9679a7597f3fc3515a0fe26fdb896e55.tar.gz";
  sha256 = "0a7lm1ki8rz7m13x4zxlr1nkd93227xgmxbhvsmrj9fa4nc5bvyy";
}