--- VirtualBox-5.0.8/Config.kmk.orig	2015-10-28 14:20:16.890267889 -0500
+++ VirtualBox-5.0.8/Config.kmk	2015-10-28 14:22:09.734462286 -0500
@@ -327,6 +327,8 @@ endif
 ifdef VBOX_ONLY_SDK
  VBOX_WITHOUT_ADDITIONS = 1
 endif
+# Build the KMS versions of the Guest Additions
+VBOX_WITH_GUEST_KMS_DRIVER=1
 # Don't create the additions ISO.
 # (Used by the additions build server, don't invert it.)
 #VBOX_WITHOUT_ADDITIONS_ISO = 1