anchor.diff:    passthru = {
       srcVerification = fetchurl {
         failEarly = true;
  -      md5Confirm = "99c80f9229554953a868127cda44e7e3";
  +      md5Confirm = "873f2bdd7c0edf317f416f54fee74b42";
         inherit (src) urls outputHash outputHashAlgo;
       };
       inherit initrdPath;
  
positive.code: }:
  
  let
    version = "2018-04-25";
    version' = stdenv.lib.replaceStrings ["-"] [""] version;
    id = "27776";
  
    initrdPath = "share/intel-microcode/intel-microcode-initrd.img";
  in
  
negative.code: 
    src = fetchurl {
      url = "https://downloadmirror.intel.com/${id}/eng/microcode-${version'}.tgz";
      multihash = "QmSe9fWp8KLd2aHwJHtoaM49avvnyYuGQok81cD6VxEb8x";
      hashOutput = false;
      sha256 = "4a1a346fdf48e1626d4c9d0d47bbbc6a4052f56e359c85a3dd2d10fd555e5938";
    };
  
    nativeBuildInputs = [
  