anchor.diff:    version = "0.5.1-2";
   
     src = fetchurl {
  -      url    = https://luarocks.org/lua-messagepack-0.5.1-2.src.rock;
  -      sha256 = "0bsdzdd24p9z3j4z1avw7qaqx87baa1pm58v275pw4h6n72z492g";
  -  };
  -  disabled = ( luaOlder "5.1");
  -  propagatedBuildInputs = [ lua ];  
  +    url    = https://luarocks.org/lua-messagepack-0.5.1-2.src.rock;
  +    sha256 = "0bsdzdd24p9z3j4z1avw7qaqx87baa1pm58v275pw4h6n72z492g";
  +  };
  +  disabled = ( luaOlder "5.1" );
  +  propagatedBuildInputs = [ lua ];
     buildType = "builtin";
   
     meta = {
       homepage = "http://fperrad.frama.io/lua-MessagePack/";
  -    description="a pure Lua implementation of the MessagePack serialization format";
  +    description = "a pure Lua implementation of the MessagePack serialization format";
       license = {
         fullName = "MIT/X11";
       };
  
positive.code:   version = "0.5.1-1";
  
    src = fetchurl {
        url    = https://luarocks.org/rapidjson-0.5.1-1.src.rock;
        sha256 = "0hnqsixnbz95cvm9q5dn0lr0qjvhqw4llw6l1sjswwk0am4yybay";
    };
    disabled = ( luaOlder "5.1");
    propagatedBuildInputs = [ lua ];  
    buildType = "cmake";
  
    meta = {
      homepage = "https://github.com/xpol/lua-rapidjson";
      description="Json module based on the very fast RapidJSON.";
      license = {
        fullName = "MIT";
      };
  
negative.code:   version = "2.0-1";
  
    src = fetchurl {
      url    = https://luarocks.org/lua-toml-2.0-1.src.rock;
      sha256 = "0lyqlnydqbplq82brw9ipqy9gijin6hj1wc46plz994pg4i2c74m";
    };
    disabled = ( luaOlder "5.1" );
    propagatedBuildInputs = [ lua ];
    buildType = "builtin";
  
    meta = {
      homepage = "https://github.com/jonstoler/lua-toml";
      description = "toml decoder/encoder for Lua";
      license = {
        fullName = "MIT";
      };
  