--- a/suite/config/mozconfigs/macosx-universal/release
+++ b/suite/config/mozconfigs/macosx-universal/release
@@ -4,17 +4,19 @@
 # go away.
 if test -e "$topsrcdir/suite/config/version.txt"; then
   unset CC
   unset CXX
 fi
 
 # Make sure Lightning is also unified, this needs to happen before including
 # the universal mozconfig because Lightning's univeral.mk needs to run first.
-mk_add_options MOZ_POSTFLIGHT_ALL+=calendar/lightning/build/universal.mk
+#
+# NB(2.46): Disabled due to extensions failing at repack.
+# mk_add_options MOZ_POSTFLIGHT_ALL+=calendar/lightning/build/universal.mk
 
 . $topsrcdir/build/macosx/universal/mozconfig
 
 ac_add_options --enable-application=suite
 ac_add_options --enable-update-channel=${MOZ_UPDATE_CHANNEL}
 
 # Needed to enable breakpad in application.ini
 export MOZILLA_OFFICIAL=1