--- src/VBox/HostDrivers/VBoxNetAdp/Makefile.kmk.orig	2020-07-10 02:57:01.000000000 +1000
+++ src/VBox/HostDrivers/VBoxNetAdp/Makefile.kmk	2020-08-22 01:47:37.465369000 +1000
@@ -27,7 +27,7 @@
 SUB_DEPTH = ../../../..
 include $(KBUILD_PATH)/subheader.kmk
 
-if1of ($(KBUILD_TARGET), solaris darwin freebsd)
+if1of ($(KBUILD_TARGET), solaris darwin bsdsunix freebsd)
  #
  # VBoxNetAdp - Virtual Network Adapter
  # Note! On Solaris the name has to be <= 8 chars long.
@@ -38,6 +38,7 @@
   VBoxNetAdp_INST             = $(INST_VBOXNETADP)$(if $(eq $(KBUILD_TARGET),darwin),Contents/MacOS/)
   VBoxNetAdp_DEBUG_INST.darwin= $(patsubst %/,%,$(INST_VBOXNETADP))
   VBoxNetAdp_NAME.solaris     = vboxnet
+  VBoxNetAdp_NAME.bsdsunix    = vboxnetadp
   VBoxNetAdp_NAME.freebsd     = vboxnetadp
   VBoxNetAdp_DEPS.solaris    += $(VBOX_SVN_REV_KMK)
   VBoxNetAdp_DEFS             = IN_RT_R0 VBOX_SVN_REV=$(VBOX_SVN_REV) IN_SUP_STATIC
@@ -50,6 +51,9 @@
   	VBoxNetAdp.c
   VBoxNetAdp_SOURCES.solaris  = \
   	solaris/VBoxNetAdp-solaris.c
+  VBoxNetAdp_SOURCES.bsdsunix   = \
+  	bsdsunix/VBoxNetAdp-bsdsunix.c \
+  	VBoxNetAdp.c
   VBoxNetAdp_SOURCES.freebsd   = \
   	freebsd/VBoxNetAdp-freebsd.c \
   	VBoxNetAdp.c
@@ -184,6 +188,36 @@
 
 endif # linux
 
+ifeq ($(KBUILD_TARGET),bsdsunix)
+ #
+ # Install source files for compilation on BSDSUniX.
+ # files_vboxnetadp defines VBOX_VBOXNETADP_SOURCES.
+ #
+ INSTALLS += VBoxNetAdp-src
+ include $(PATH_SUB_CURRENT)/bsdsunix/files_vboxnetadp
+ VBoxNetAdp-src_INST = bin/src/vboxnetadp/
+ VBoxNetAdp-src_SOURCES = \
+	$(subst $(DQUOTE),,$(VBOX_VBOXNETADP_SOURCES)) \
+	$(VBoxNetAdp-src_0_OUTDIR)/Makefile
+ VBoxNetAdp-src_CLEAN = \
+	$(VBoxNetAdp-src_0_OUTDIR)/Makefile	\
+
+$$(VBoxNetAdp-src_0_OUTDIR)/Makefile: \
+		$(PATH_SUB_CURRENT)/bsdsunix/Makefile \
+		$$(if $$(eq $$(VBoxNetAdp/bsdsunix/Makefile_VBOX_HARDENED),$$(VBOX_WITH_HARDENING)),,FORCE) \
+		| $$(dir $$@)
+	$(QUIET)$(RM) -f -- $@
+	$(QUIET)$(CP) -f $< $@
+ ifndef VBOX_WITH_HARDENING
+	$(QUIET)$(SED) -e "s;-DVBOX_WITH_HARDENING;;g" --output $@.tmp $@
+	${QUIET}$(MV) -f $@.tmp $@
+ endif
+ ifndef VBOX_WITH_NETFLT_VIMAGE
+	$(QUIET)$(SED) -e "s;-DVIMAGE;;g" --output $@.tmp $@
+	${QUIET}$(MV) -f $@.tmp $@
+ endif
+endif # bsdsunix
+
 ifeq ($(KBUILD_TARGET),freebsd)
  #
  # Install source files for compilation on FreeBSD.
@@ -203,12 +237,15 @@
 		$$(if $$(eq $$(VBoxNetAdp/freebsd/Makefile_VBOX_HARDENED),$$(VBOX_WITH_HARDENING)),,FORCE) \
 		| $$(dir $$@)
 	$(QUIET)$(RM) -f -- $@
- ifndef VBOX_WITH_HARDENING
-	$(QUIET)$(SED) -e "s;-DVBOX_WITH_HARDENING;;g" --output $@ $<
- else
 	$(QUIET)$(CP) -f $< $@
+ ifndef VBOX_WITH_HARDENING
+	$(QUIET)$(SED) -e "s;-DVBOX_WITH_HARDENING;;g" --output $@.tmp $@
+	${QUIET}$(MV) -f $@.tmp $@
+ endif
+ ifndef VBOX_WITH_NETFLT_VIMAGE
+	$(QUIET)$(SED) -e "s;-DVIMAGE;;g" --output $@.tmp $@
+	${QUIET}$(MV) -f $@.tmp $@
  endif
-
 endif # freebsd
 
 include $(FILE_KBUILD_SUB_FOOTER)