{ fetchurl }:

fetchurl {
  url = "https://github.com/commercialhaskell/all-cabal-hashes/archive/3e87a900a11faa97a8a068874c932f3172d0aa76.tar.gz";
  sha256 = "0cf35vics1211pr1g8a804zm3w4lsdacqkgw3hqk7wdrrbasb8ip";
}