anchor.diff:      "mirror://gnu/texinfo/texinfo-${version}.tar.xz"
     ];
   
  -  version = "6.5";
  +  version = "6.6";
   in
   stdenv.mkDerivation rec {
     name = "texinfo-${version}";
  
positive.code:   passthru = {
      srcVerification = fetchurl rec {
        failEarly = true;
        urls = tarballUrls "6.5";
        pgpsigUrls = map (n: "${n}.sig") urls;
        pgpKeyFingerprint = "EAF6 69B3 1E31 E1DE CBD1  1513 DDBC 579D AB37 FBA9";
        inherit (src) outputHashAlgo;
        outputHash = "77774b3f4a06c20705cc2ef1c804864422e3cf95235e965b1f00a46df7da5f62";
      };
    };
  
  
negative.code:   src = fetchurl {
      urls = tarballUrls version;
      hashOutput = false;
      sha256 = "9bb9ca00da53f26a7e5725eee49689cd4a1e18d25d5b061ac8b2053018d93d66";
    };
  
    nativeBuildInputs = [
  