anchor.diff:      libgudev hicolor-icon-theme
     ] ++ lib.optional useFdk fdk_aac;
   
  +  # 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;
     enableParallelBuilding = true;
   
     preConfigure = ''
  
positive.code: #
  
  { stdenv, lib, fetchurl,
    python2, pkgconfig, autoconf, automake, yasm, libtool, m4,
    fribidi, fontconfig, freetype, jansson, zlib,
    libass, libiconv, libsamplerate, libxml2, bzip2,
    ffmpeg_4, libtheora, x264, x265, libvpx, mpeg2dec,
  
negative.code:   };
  
    nativeBuildInputs = [
      python2 pkgconfig autoconf automake cmake yasm libtool m4
    ] ++ lib.optionals useGtk [ intltool wrapGAppsHook ];
  
    buildInputs = [
      fribidi fontconfig freetype jansson zlib
  