{ fetchurl }:

fetchurl {
  url = "https://github.com/commercialhaskell/all-cabal-hashes/archive/e8df5568f80e6230e29c2381e842db35fe11cd71.tar.gz";
  sha256 = "1fz4iax88pmlqpb4zp3l6mb6bmkzzha0q6mm3xasabh5yl83dbhy";
}