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