anchor.diff:    passthru = {
       srcVerification = fetchurl rec {
         failEarly = true;
  -      urls = tarballUrls "2.2.16";
  -      sha256 = "6cbe8d454bf5dc204621eed3016d721b66298fa95363395bb8eeceb1d2fd14cb";
  +      urls = tarballUrls "2.2.17";
  +      sha256 = "afa262868e39b651a2db4c071fba90415154243e83a830ca00516f9a807fd514";
         fullOpts = {
           pgpsigUrl = map (n: "${n}.sig") urls;
           pgpKeyFingerprints = [
  
positive.code:   src = fetchurl {
      urls = tarballUrls version;
      hashOutput = false;
      sha256 = "6cbe8d454bf5dc204621eed3016d721b66298fa95363395bb8eeceb1d2fd14cb";
    };
  
    nativeBuildInputs = [
  
negative.code:     "mirror://gnupg/gnupg/gnupg-${version}.tar.bz2"
    ];
  
    version = "2.2.17";
  in
  stdenv.mkDerivation rec {
    name = "gnupg-${version}";
  