anchor.diff:    passthru = {
       srcVerification = fetchurl rec {
         failEarly = true;
  -      urls = tarballUrls "1.3.4";
  +      urls = tarballUrls "1.3.5";
         pgpsigUrls = map (n: "${n}.sig") urls;
         inherit (gnupg.srcVerification) pgpKeyFingerprints;
  -      outputHash = "f6c2883cebec5608692d8730843d87f237c0964d923bbe7aa89c05f20558ad4f";
  +      outputHash = "41444fd7a6ff73a79ad9728f985e71c9ba8cd3e5e53358e70d5f066d35c1a340";
         inherit (src) outputHashAlgo;
       };
     };
  
positive.code:   src = fetchurl {
      urls = tarballUrls version;
      hashOutput = false;
      sha256 = "f6c2883cebec5608692d8730843d87f237c0964d923bbe7aa89c05f20558ad4f";
    };
  
    buildInputs = [
  
negative.code:     "mirror://gnupg/libksba/libksba-${version}.tar.bz2"
    ];
  
    version = "1.3.5";
  in
  stdenv.mkDerivation rec {
    name = "libksba-${version}";
  