anchor.diff:    src = fetchurl {
       urls = tarballUrls version;
       hashOutput = false;
  -    sha256 = "2e3764512aaf2ce598af5a38818c0ea23dedf1ff5460070d1b6cee5c3336e797";
  +    sha256 = "7b9338cf52706facb2e18587dceda2fbc4a2a3519efa1e15a3f2a68193942f80";
     };
   
     # One of the tests fails to compile for 0.9.6 when run in parallel
  
positive.code:   passthru = {
      srcVerification = fetchurl rec {
        failEarly = true;
        urls = tarballUrls "0.9.7";
        pgpsigUrls = map (n: "${n}.sig") urls;
        pgpKeyFingerprint = "4622 25C3 B46F 3487 9FC8  496C D605 848E D7E6 9871";
        inherit (src) outputHashAlgo;
        outputHash = "2e3764512aaf2ce598af5a38818c0ea23dedf1ff5460070d1b6cee5c3336e797";
      };
    };
  
  
negative.code:     "mirror://gnu/libunistring/libunistring-${version}.tar.xz"
    ];
  
    version = "0.9.8";
  in
  stdenv.mkDerivation rec {
    name = "libunistring-${version}";
  