anchor.diff:      zbar
     ] ++ lib.optionals faacSupport [
       faac
  +  ] ++ lib.optionals enableGplPlugins [
  +    libmpeg2
  +    mjpegtools
  +    faad2
  +    x265
     ] ++ lib.optionals stdenv.isLinux [
       bluez
       libva # vaapi requires libva -> libdrm -> libpciaccess, which is Linux-only in nixpkgs
  
positive.code:     orc # for orcc
      python3
      gettext
      gobject-introspection
    ] ++ lib.optionals stdenv.isLinux [
      wayland # for wayland-scanner
  
negative.code: , fdk_aac
  , flite
  , gsm
  , json-glib
  , libaom
  , libdc1394
  , libde265
  