{ fetchurl }:

fetchurl {
  url = "https://github.com/commercialhaskell/all-cabal-hashes/archive/5e87c40f2cd96bd5dd953758e82f302107c7895e.tar.gz";
  sha256 = "0hjkddda9mdm21nb9bkhr9n5r9jllisif1qmzha91a9cps5w1mx5";
}