{ fetchurl }:

fetchurl {
  url = "https://github.com/commercialhaskell/all-cabal-hashes/archive/cc32e957fbe01d248c9a0e99253fadb37fd3adfa.tar.gz";
  sha256 = "121n26r3sm55ycwh6m71n4823c5af3hfpc497g4prf1j2n4yh2dl";
}