anchor.diff:      ffmpeg
       zlib
     ];
  +
  +  preAutoreconf = ''
  +    mkdir -pv src/config
  +  '';
   
     configureFlags = [
       "--disable-debug"
  
positive.code: }:
  
  let
    version = "2.23";
  in
  stdenv.mkDerivation rec {
    name = "ffms-${version}";
  
    src = fetchzip {
      version = 2;
      url = "https://github.com/FFMS/ffms2/archive/${version}.tar.gz";
      sha256 = "8a40f22a28e15c974906a222b44b6df29d9c50d34f41ded1ab1ad6edd6711a8d";
    };
  
    nativeBuildInputs = [
  
negative.code: { stdenv
  , autoreconfHook
  , fetchFromGitHub
  , lib
  
  , ffmpeg
  