{ fetchurl }:

fetchurl {
  url = "https://github.com/commercialhaskell/all-cabal-hashes/archive/b35023f435e7713e5053d3dcd16691e3aff48227.tar.gz";
  sha256 = "1mnh1bhr8caszxrl44l3iig8kshq7djibnmy0sx0q7inj260xcs7";
}
