anchor.diff:    passthru = {
       srcVerification = fetchurl rec {
         failEarly = true;
  -      urls = tarballUrls "1.7.8";
  +      urls = tarballUrls "1.8.0";
         pgpsigUrls = map (n: "${n}.sig") urls;
         pgpKeyFingerprints = [
           # Werner Koch
  
positive.code:   src = fetchurl {
      urls = tarballUrls version;
      hashOutput = false;
      sha256 = "948276ea47e6ba0244f36a17b51dcdd52cfd1e664b0a1ac3bc82134fb6cec199";
    };
  
    buildInputs = [
  
negative.code:     "mirror://gnupg/libgcrypt/libgcrypt-${version}.tar.bz2"
    ];
  
    version = "1.8.0";
  in
  stdenv.mkDerivation rec {
    name = "libgcrypt-${version}";
  