{ fetchurl }:

fetchurl {
  url = "https://github.com/commercialhaskell/all-cabal-hashes/archive/d202e2aff06500ede787ed63544476f6d41e9eb7.tar.gz";
  sha256 = "00hmclrhr3a2h9vshsl909g0zgymlamx491lkhwr5kgb3qx9sfh2";
}