{ fetchurl }:

fetchurl {
  url = "https://github.com/commercialhaskell/all-cabal-hashes/archive/61de1110af16fa0645a8cc8bbaf4a9c6fca9d8e8.tar.gz";
  sha256 = "0vwfm1imwcffyliaama572ksjgqmwxk48py0wgvgpi2vg08w7a12";
}