{ fetchurl }:

fetchurl {
  url = "https://github.com/commercialhaskell/all-cabal-hashes/archive/214ceb3bed92d49a0dffc6c2d8d21b1d0bcc7c25.tar.gz";
  sha256 = "1m8rm46w9xc8z8dvjg3i0bqpx9630i6ff681dp445q8wv7ji9y2v";
}