[meson] Add a note on meson stability status
diff --git a/meson.build b/meson.build
index d89ebb8..8ca46b9 100644
--- a/meson.build
+++ b/meson.build
@@ -3,6 +3,8 @@
   default_options : ['cpp_std=c++11'],
   version: '2.6.4')
 
+warning('Meson is not our main build system yet, don\'t use it for packaging HarfBuzz for *nix distros for now')
+
 hb_version_arr = meson.project_version().split('.')
 hb_version_major = hb_version_arr[0].to_int()
 hb_version_minor = hb_version_arr[1].to_int()