{ fetchurl }:

fetchurl {
  url = "https://github.com/commercialhaskell/all-cabal-hashes/archive/db00b74891fcaae598fdcaf3835e274be8f2c082.tar.gz";
  sha256 = "0csvwqnvyg2jg76rr4blm4hm6max10a6as4mnwdz76sliw4092sg";
}