anchor.diff:      # TODO: add gstreamer mpeg-ts support
       (cmFlag "USE_GSTREAMER_MPEGTS" false)
       # TODO: add gstreamer GL support
  -    (cmFlag "USE_GSTREAMER_GL" (gstreamer != null && gst-plugins-base != null))
  +    (cmFlag "USE_GSTREAMER_GL" false)
       (cmFlag "ENABLE_X11_TARGET" (xorg.libX11 != null))
       # TODO: add wayland support (linker errors)
       (cmFlag "ENABLE_WAYLAND_TARGET" (wayland != null))
  
positive.code:     glib
      gobject-introspection
      gnutls
      gst-plugins-bad
      gst-plugins-base
      gstreamer
      gtk2
  
negative.code: , glib
  , gobject-introspection
  , gnutls
  , gst-plugins-base
  , gstreamer
  , gtk2
  