{ fetchurl }:

fetchurl {
  url = "https://github.com/commercialhaskell/all-cabal-hashes/archive/62720a1288846aabc4e42d4404a85ea771d24a11.tar.gz";
  sha256 = "1qr07s0l7ip28639fbhwi8nhcyzs3mmhzqd0zny5an0dwxlx14qb";
}