{ fetchurl }:

fetchurl {
  url = "https://github.com/commercialhaskell/all-cabal-hashes/archive/b2812edaaed9f9033e48dfbcd45e7e5fb56daccd.tar.gz";
  sha256 = "1a2073gknks4r2ibm3ji1wrib6pr3aicg6wjgzsj2r5xgad7jm6g";
}