anchor.diff:  { stdenv, lib, fetchFromGitHub, rustPlatform
   , openssl, pkg-config, protobuf
   , Security, libiconv, rdkafka
  +, tzdata
   
   , features ?
       (if stdenv.isAarch64
  
positive.code: 
  rustPlatform.buildRustPackage rec {
    pname = "vector";
    version = "0.7.2";
  
    src = fetchFromGitHub {
      owner  = "timberio";
      repo   = pname;
      rev    = "v${version}";
      sha256 = "1r6pqljrl0cqz5x09p6bmf4h52h8m02pg05a09idj86v0c0q6bw3";
    };
  
    cargoSha256 = "1c742g7a4z5lhr991hxdhwk8h0d43r4vv5bxj80sf3lynyx60yzf";
    buildInputs = [ openssl pkg-config protobuf rdkafka ]
                  ++ stdenv.lib.optional stdenv.isDarwin [ Security libiconv ];
  
  
negative.code:   PROTOC_INCLUDE="${protobuf}/include";
  
    cargoBuildFlags = [ "--no-default-features" "--features" "${lib.concatStringsSep "," features}" ];
    checkPhase = "TZDIR=${tzdata}/share/zoneinfo cargo test --no-default-features --features ${lib.concatStringsSep "," features},disable-resolv-conf -- --test-threads 1";
  
    meta = with stdenv.lib; {
      description = "A high-performance logs, metrics, and events router";
  