anchor.diff:      "mirror://gnu/libtasn1/libtasn1-${version}.tar.gz"
     ];
   
  -  version = "4.8";
  +  version = "4.9";
   in
   stdenv.mkDerivation rec {
     name = "libtasn1-${version}";
  
positive.code:   src = fetchurl {
      urls = tarballUrls version;
      allowHashOutput = false;
      sha256 = "fa802fc94d79baa00e7397cedf29eb6827d4bd8b4dd77b577373577c93a8c513";
    };
  
    nativeBuildInputs = [
  
negative.code:   passthru = {
      srcVerification = fetchurl rec {
        failEarly = true;
        urls = tarballUrls "4.9";
        pgpsigUrls = map (n: "${n}.sig") urls;
        pgpKeyFingerprint = "1F42 4189 05D8 206A A754  CCDC 29EE 58B9 9686 5171";
        outputHash = "4f6f7a8fd691ac2b8307c8ca365bad711db607d4ad5966f6938a9d2ecd65c920";
        inherit (src) outputHashAlgo;
      };
    };
  