{ fetchurl }:

fetchurl {
  url = "https://github.com/commercialhaskell/all-cabal-hashes/archive/bee48f46f4c9e9c1195bf81efb61fa5fb0aec0dc.tar.gz";
  sha256 = "0wxj0iakqy1cyncga8s1qlb8c06vj3ilh5z8lpann7xr8yh6sm4b";
}