{ fetchurl }:

fetchurl {
  url = "https://github.com/commercialhaskell/all-cabal-hashes/archive/98ec0eee2ddef5d4a00e2ac4a95e8add46d23b69.tar.gz";
  sha256 = "0svcaaflqi5c815z3yrh61bjny1jnwp42sylmsnwryjldqvizc1a";
}