anchor.diff:      "--sysconfdir=/etc"
       "--enable-pie"
       "--enable-relro-now"
  +    "--enable-dnstap"
  +    "--with-dnstap-socket-path=/run/dnstap.sock"
     ];
   
     preInstall = ''
  
positive.code: , fetchurl
  
  , expat
  , libevent
  , openssl
  }:
  
  stdenv.mkDerivation rec {
  
negative.code: 
    buildInputs = [
      expat
      fstrm
      libevent
      openssl
      protobuf-c
    ];
  
    configureFlags = [
  