anchor.diff:        '';
   
         meta = with stdenv.lib; {
  -        description    = "Very fast, header only, C++ logging library.";
  -        homepage       = https://github.com/gabime/spdlog;
  +        description    = "Very fast, header only, C++ logging library";
  +        homepage       = "https://github.com/gabime/spdlog";
           license        = licenses.mit;
           maintainers    = with maintainers; [ obadz ];
           platforms      = platforms.all;
  
positive.code: let
    generic = { version, sha256 }:
      stdenv.mkDerivation {
        name = "spdlog-${version}";
        inherit version;
  
        src = fetchFromGitHub {
  
negative.code: 
        nativeBuildInputs = [ cmake ];
  
        cmakeFlags = [ "-DSPDLOG_BUILD_EXAMPLE=OFF" "-DSPDLOG_BUILD_BENCH=OFF" ];
  
        outputs = [ "out" "doc" ];
  
  