anchor.diff:    src = fetchurl {
       urls = tarballUrls version;
       allowHashOutput = false;
  -    sha256 = "7f0c7f65b98c4048f649bfeebfa4d4c1559707492962504592b985634c939eaa";
  +    sha256 = "9268e1cc487de5e6e4460fca612a06e4f383072ac43ae90603e5e46783d3e540";
     };
   
     postPatch = ''
  
positive.code:   passthru = {
      srcVerification = fetchurl rec {
        failEarly = true;
        urls = tarballUrls "1.23";
        pgpsigUrls = map (n: "${n}.sig") urls;
        inherit (gnupg.srcVerification) pgpKeyFingerprints;
        outputHash = "7f0c7f65b98c4048f649bfeebfa4d4c1559707492962504592b985634c939eaa";
        inherit (src) outputHashAlgo;
      };
    };
  
negative.code:     "mirror://gnupg/libgpg-error/libgpg-error-${version}.tar.bz2"
    ];
  
    version = "1.24";
  in
  stdenv.mkDerivation rec {
    name = "libgpg-error-${version}";
  