{ fetchurl }:

fetchurl {
  url = "https://github.com/commercialhaskell/all-cabal-hashes/archive/edb0920a8dbbd592d67a781d0b905728515ab623.tar.gz";
  sha256 = "08yvpwzw7c3xw3w970ysykj44vglqfiq057kx0axk81s68v83rcy";
}