anchor.diff:  
     nativeBuildInputs = [ cmake flex bison ];
   
  +  buildInputs = lib.optionals stdenv.isLinux [ systemd ];
  +
  +  cmakeFlags = [ "-DFLB_METRICS=ON" "-DFLB_HTTP_SERVER=ON" ];
  +
     patches = lib.optionals stdenv.isDarwin [ ./fix-luajit-darwin.patch ];
   
     # _FORTIFY_SOURCE requires compiling with optimization (-O)
     NIX_CFLAGS_COMPILE = lib.optionalString stdenv.cc.isGNU "-O";
  +
  +  outputs = [ "out" "dev" ];
   
     postPatch = ''
       substituteInPlace src/CMakeLists.txt \
  
positive.code: { lib, stdenv, fetchFromGitHub, cmake, flex, bison }:
  
  stdenv.mkDerivation rec {
    pname = "fluent-bit";
  
negative.code:   meta = with lib; {
      description = "Log forwarder and processor, part of Fluentd ecosystem";
      homepage = "https://fluentbit.io";
      maintainers = with maintainers; [ samrose fpletz ];
      license = licenses.asl20;
      platforms = platforms.unix;
    };
  