anchor.diff:    src = fetchurl {
       urls = tarballUrls version;
       hashOutput = false;
  -    sha256 = "c345c5e73cc2332f8d50db84a2280abfb1d8f6d4f1858b9daa30404db44540ca";
  +    sha256 = "5d38826656e746c936e7742d9cde072b50baa3c4c49daa168a56813612bf03ff";
     };
   
     postPatch = ''
  
positive.code:     "mirror://gnupg/libgpg-error/libgpg-error-${version}.tar.bz2"
    ];
  
    version = "1.32";
  in
  stdenv.mkDerivation rec {
    name = "libgpg-error-${version}";
  
negative.code:   passthru = {
      srcVerification = fetchurl rec {
        failEarly = true;
        urls = tarballUrls "1.33";
        outputHash = "5d38826656e746c936e7742d9cde072b50baa3c4c49daa168a56813612bf03ff";
        inherit (src) outputHashAlgo;
        fullOpts = {
          pgpsigUrls = map (n: "${n}.sig") urls;
          inherit (gnupg.srcVerification) pgpKeyFingerprints;
        };
      };
    };
  
  