anchor.diff:      json_c
     ];
   
  +  postPatch = ''
  +    sed -i configure.ac \
  +      -e 's,$(git describe .*),${version},'
  +  '';
  +
     configureFlags = [
       "--with-lua=yes"
       "--with-libpcap=yes"
  
positive.code: , libpcap
  , lua5_1
  , json_c
  }:
  stdenv.mkDerivation rec {
    pname = "tracebox";
  
negative.code: 
    enableParallelBuilding = true;
  
    passthru.tests.version = testers.testVersion {
      package = tracebox;
      command = "tracebox -V";
    };
  
    meta = with lib; {
      homepage = "http://www.tracebox.org/";
      description = "A middlebox detection tool";
  