anchor.diff:    };
   
     nativeBuildInputs = [
  -    python2 pkgconfig autoconf automake cmake nasm libtool m4
  +    python2 pkgconfig autoconf automake libtool m4
     ] ++ lib.optionals useGtk [ intltool wrapGAppsHook ];
   
     buildInputs = [
  
positive.code: 
  { stdenv, lib, fetchurl, fetchpatch,
    # Main build tools
    python2, pkgconfig, autoconf, automake, cmake, nasm, libtool, m4, lzma,
    numactl,
    # Processing, video codecs, containers
    ffmpeg-full, nv-codec-headers, libogg, x264, x265, libvpx, libtheora, dav1d,
  
negative.code:   # look at ./make/configure.py search "enable_nvenc"
      ++ lib.optional stdenv.isLinux nv-codec-headers;
  
    preConfigure = ''
      patchShebangs scripts
  
  