anchor.diff:      nixos = nixosTests.pdns-recursor;
     };
   
  -  meta = {
  +  meta = with lib; {
       description = "A recursive DNS server";
       homepage = "https://www.powerdns.com/";
       platforms = platforms.linux;
  
positive.code: , openssl, systemd, lua, luajit, protobuf
  , enableProtoBuf ? false
  }:
  assert enableProtoBuf -> protobuf != null;
  
  with lib;
  
  stdenv.mkDerivation rec {
    pname = "pdns-recursor";
  
negative.code:   buildInputs = [
      boost openssl systemd
      lua luajit
    ] ++ lib.optional enableProtoBuf protobuf;
  
    configureFlags = [
      "--enable-reproducible"
  