{ fetchurl }:

fetchurl {
  url = "https://github.com/commercialhaskell/all-cabal-hashes/archive/f59e85c25b8e9f07459338884e25d16752839b54.tar.gz";
  sha256 = "0yapmana2kzsixmgghj76w3s546d258rbzw7qmfqhi6bxyhc6a86";
}