{ fetchurl }:
fetchurl {
url = "https://github.com/commercialhaskell/all-cabal-hashes/archive/e0bc864e0b6edb5e5ce1ec4bfa763a442b343bf5.tar.gz";
sha256 = "1lmjxam58srrv9cjqajqz4bishx8hy99db3cx83i95qb3qiiiz6m";
}