anchor.diff:  assert elem stdenv.system [ "x86_64-linux" "x86_64-darwin" "aarch64-linux" "aarch64-darwin" ];
   
   let
  -  common = { pname, version, untarDir ? "${pname}-${version}", sha256, jdk, openssl, nativeLibs ? [ ], libPatches ? "" }:
  +  common = { pname, version, untarDir ? "${pname}-${version}", sha256, jdk, openssl ? null, nativeLibs ? [ ], libPatches ? "" }:
       let
         platformUrlSuffix = optionalString stdenv.isAarch64 "-aarch64";
       in
  
positive.code:       x86_64-linux = "1w31x4bk9f2swnx8qxx0cgwfg8vbpm6cy5lvfnbbpl3rsjhmyg97";
      };
      jdk = jdk8_headless;
      openssl = null;
    };
  }
  
negative.code:           aarch64-linux = "00ln18vpi07jq2slk3kplyhcj8ad41n0yl880q5cihilk7daclxz";
            aarch64-darwin = aarch64-linux;
          };
  
          inherit openssl;
          nativeLibs = [ stdenv.cc.cc.lib protobuf3_7 zlib snappy ];
          libPatches = ''
  