--- src/VBox/HostDrivers/VBoxNetFlt/bsdsunix/Makefile.orig	2020-07-10 02:57:01.000000000 +1000
+++ src/VBox/HostDrivers/VBoxNetFlt/bsdsunix/Makefile	2020-08-22 02:22:57.496733000 +1000
@@ -0,0 +1,47 @@
+# $Id: Makefile $
+## @file
+# Makefile for the VirtualBox BSDSUniX Host Driver.
+#
+
+#
+# Copyright (C) 2006-2017 Oracle Corporation
+#
+# This file is part of VirtualBox Open Source Edition (OSE), as
+# available from http://www.virtualbox.org. This file is free software;
+# you can redistribute it and/or modify it under the terms of the GNU
+# General Public License (GPL) as published by the Free Software
+# Foundation, in version 2 as it comes in the "COPYING" file of the
+# VirtualBox OSE distribution. VirtualBox OSE is distributed in the
+# hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
+#
+# The contents of this file may alternatively be used under the terms
+# of the Common Development and Distribution License Version 1.0
+# (CDDL) only, as it comes in the "COPYING.CDDL" file of the
+# VirtualBox OSE distribution, in which case the provisions of the
+# CDDL are applicable instead of those of the GPL.
+#
+# You may elect to license modified versions of this file under the
+# terms and conditions of either the GPL or the CDDL or both.
+#
+
+KMOD = vboxnetflt
+
+CFLAGS += -DRT_OS_BSDSUNIX -DIN_RING0 -DIN_RT_R0 -DIN_SUP_R0 -DVBOX -DRT_WITH_VBOX -Iinclude -I. -Ir0drv -w -DVBOX_WITH_HARDENING -DVIMAGE
+
+.if (${MACHINE_ARCH} == "i386")
+ CFLAGS += -DRT_ARCH_X86
+.elif (${MACHINE_ARCH} == "amd64")
+ CFLAGS += -DRT_ARCH_AMD64
+.endif
+
+SRCS = \
+	VBoxNetFlt-bsdsunix.c \
+	VBoxNetFlt.c \
+	SUPR0IdcClient-bsdsunix.c \
+	SUPR0IdcClient.c \
+	SUPR0IdcClientComponent.c
+
+SRCS += device_if.h bus_if.h opt_netgraph.h
+
+.include <bsd.kmod.mk>
+