anchor.diff:    src = fetchzip {
       version = 6;
       url = "http://www.argyllcms.com/Argyll_V${version}_src.zip";
  -    multihash = "QmUuxRhYwfsaRrqXDfBoeYmPWfbo6XR5H5D41CNL27JFiN";
  +    multihash = "QmdFLqmgW29xbkVh6zRGLjNMWQGcVb1A7cGAba4s7Xv3KD";
       purgeTimestamps = true;
  -    sha256 = "fa171e7974e195477d1447dc59cd5eeb0c923170c1cbb057f6e926c26eb0fda6";
  -    # The argyllcms web server doesn't like curl ...
  -    fullOpts = {
  -      curlOpts = "--user-agent 'Mozilla/5.0'";
  -    };
  +    sha256 = "718b4d3018e4d92dcae06a098f13378f55024e8622b12120a59dd67f17cc59d2";
     };
   
     nativeBuildInputs = [
  
positive.code:       zlib
      ];
    };
    version = "2.0.0";
  in
  stdenv.mkDerivation rec {
    name = "argyllcms-${version}";
  
negative.code:         urls
          outputHash
          outputHashAlgo
          purgeTimestamps;
        insecureHashOutput = true;
      };
  