anchor.diff:  
   { stdenv, lib, fetchurl, fetchpatch,
     # Main build tools
  -  python2, pkgconfig, autoconf, automake, cmake, nasm, libtool, m4, lzma,
  +  python2, pkgconfig, autoconf, automake, libtool, m4, lzma,
     numactl,
     # Processing, video codecs, containers
     ffmpeg-full, nv-codec-headers, libogg, x264, x265, libvpx, libtheora, dav1d,
  
positive.code:   # look at ./make/configure.py search "enable_nvenc"
      ++ lib.optional stdenv.isLinux nv-codec-headers;
  
    # NOTE: 2018-12-25: v1.2.0 now requires cmake dep
    # (default distribution bundles&builds 3rd party libs),
    # don't trigger cmake build
    dontUseCmakeConfigure = true;
    # cp: cannot create regular file './internal_defaults.json': File exists
    enableParallelBuilding = false;
  
    preConfigure = ''
      patchShebangs scripts
  
  
negative.code:   };
  
    nativeBuildInputs = [
      python2 pkgconfig autoconf automake libtool m4
    ] ++ lib.optionals useGtk [ intltool wrapGAppsHook ];
  
    buildInputs = [
  