anchor.diff:    src = fetchurl {
       urls = tarballUrls version;
       hashOutput = false;
  -    sha256 = "e07d538704aa65e477b6a392b32ff9fc5edf75ab9a40ddfc876186c4ff4d68ac";
  +    sha256 = "f29e89cc5de813f45786580101aaee3984a65818631d4ddbda7b32f699b87c2e";
     };
   
     buildInputs = [
  
positive.code:     "mirror://sourceforge/pcre/pcre/${version}/pcre2-${version}.tar.bz2"
    ];
  
    version = "10.31";
  in
  stdenv.mkDerivation rec {
    name = "pcre2-${version}";
  
negative.code:   passthru = {
      srcVerification = fetchurl rec {
        failEarly = true;
        urls = tarballUrls "10.32";
        inherit (src)
          outputHash
          outputHashAlgo;
        fullOpts = {
          pgpsigUrls = map (n: "${n}.sig") urls;
            # Philip Hazel
          pgpKeyFingerprint = "45F6 8D54 BBE2 3FB3 039B  46E5 9766 E084 FB0F 43D8";
        };
      };
    };
  
  