{ fetchurl }:

fetchurl {
  url = "https://github.com/commercialhaskell/all-cabal-hashes/archive/c0fe8e827d5ec71141700f5d5a90a6f6616ecbc5.tar.gz";
  sha256 = "16is1cipkfiabbh01i247vqfviwzjpfhgf6pkli61wwlhnk0q95s";
}