diff --git a/repos/ports/lib/mk/spec/foc/virtualbox-hwaccl.mk b/repos/ports/lib/mk/spec/foc/virtualbox-hwaccl.mk
deleted file mode 100644
index 2c1958cb6..000000000
--- a/repos/ports/lib/mk/spec/foc/virtualbox-hwaccl.mk
+++ /dev/null
@@ -1 +0,0 @@
-include $(REP_DIR)/lib/mk/virtualbox-hwaccl-off.inc
diff --git a/repos/ports/lib/mk/spec/hw_x86_64/virtualbox-hwaccl.mk b/repos/ports/lib/mk/spec/hw_x86_64/virtualbox-hwaccl.mk
deleted file mode 100644
index 2c1958cb6..000000000
--- a/repos/ports/lib/mk/spec/hw_x86_64/virtualbox-hwaccl.mk
+++ /dev/null
@@ -1 +0,0 @@
-include $(REP_DIR)/lib/mk/virtualbox-hwaccl-off.inc
diff --git a/repos/ports/lib/mk/spec/linux/virtualbox-hwaccl.mk b/repos/ports/lib/mk/spec/linux/virtualbox-hwaccl.mk
deleted file mode 100644
index 2c1958cb6..000000000
--- a/repos/ports/lib/mk/spec/linux/virtualbox-hwaccl.mk
+++ /dev/null
@@ -1 +0,0 @@
-include $(REP_DIR)/lib/mk/virtualbox-hwaccl-off.inc
diff --git a/repos/ports/lib/mk/spec/muen/virtualbox-hwaccl.mk b/repos/ports/lib/mk/spec/muen/virtualbox-muen.mk
similarity index 100%
rename from repos/ports/lib/mk/spec/muen/virtualbox-hwaccl.mk
rename to repos/ports/lib/mk/spec/muen/virtualbox-muen.mk
diff --git a/repos/ports/lib/mk/spec/nova/virtualbox-hwaccl.mk b/repos/ports/lib/mk/spec/nova/virtualbox-nova.mk
similarity index 100%
rename from repos/ports/lib/mk/spec/nova/virtualbox-hwaccl.mk
rename to repos/ports/lib/mk/spec/nova/virtualbox-nova.mk
diff --git a/repos/ports/lib/mk/spec/okl4/virtualbox-hwaccl.mk b/repos/ports/lib/mk/spec/okl4/virtualbox-hwaccl.mk
deleted file mode 100644
index 2c1958cb6..000000000
--- a/repos/ports/lib/mk/spec/okl4/virtualbox-hwaccl.mk
+++ /dev/null
@@ -1 +0,0 @@
-include $(REP_DIR)/lib/mk/virtualbox-hwaccl-off.inc
diff --git a/repos/ports/lib/mk/spec/pistachio/virtualbox-hwaccl.mk b/repos/ports/lib/mk/spec/pistachio/virtualbox-hwaccl.mk
deleted file mode 100644
index 2c1958cb6..000000000
--- a/repos/ports/lib/mk/spec/pistachio/virtualbox-hwaccl.mk
+++ /dev/null
@@ -1 +0,0 @@
-include $(REP_DIR)/lib/mk/virtualbox-hwaccl-off.inc
diff --git a/repos/ports/lib/mk/virtualbox-hwaccl-off.inc b/repos/ports/lib/mk/virtualbox-hwaccl-off.mk
similarity index 100%
rename from repos/ports/lib/mk/virtualbox-hwaccl-off.inc
rename to repos/ports/lib/mk/virtualbox-hwaccl-off.mk
diff --git a/repos/ports/run/vbox_auto_genode_usb_hid.run b/repos/ports/run/vbox_auto_genode_usb_hid.run
index c7e36ef46..8d06b69a0 100644
--- a/repos/ports/run/vbox_auto_genode_usb_hid.run
+++ b/repos/ports/run/vbox_auto_genode_usb_hid.run
@@ -162,6 +162,7 @@ append config {
 	</start>
 
 	<start name="virtualbox" priority="-2">
+		<binary name="virtualbox-nova"/>
 		<resource name="RAM" quantum="448M"/>
 		<config vbox_file="vm_genode_usb_hid.vbox" vm_name="TestVM" xhci="yes" force_ioapic="yes">
 			<libc stdout="/dev/log" stderr="/dev/log">
@@ -217,7 +218,7 @@ set boot_modules {
 	fs_rom
 	ram_fs
 	report_rom
-	virtualbox
+	virtualbox-nova
 	usb_hid.iso
 	vm_genode_usb_hid.vbox
 	ld.lib.so libc.lib.so libm.lib.so pthread.lib.so libc_pipe.lib.so
diff --git a/repos/ports/run/vbox_auto_win7_share.run b/repos/ports/run/vbox_auto_win7_share.run
index a5126c40e..2fab807d7 100644
--- a/repos/ports/run/vbox_auto_win7_share.run
+++ b/repos/ports/run/vbox_auto_win7_share.run
@@ -68,6 +68,10 @@ if {(![have_spec nova] && ![have_spec muen])} {
 	exit 0
 }
 
+set virtualbox_binary "virtualbox-rem"
+if {[have_spec muen]} { set virtualbox_binary "virtualbox-muen" }
+if {[have_spec nova]} { set virtualbox_binary "virtualbox-nova" }
+
 set flavor   "win7"
 
 set use_vbox4 1
@@ -207,8 +211,10 @@ set config_of_app {
 		<config> <rom/> </config>
 	</start>
 
-	<start name="vbox" priority="-2">
-		<binary name="virtualbox"/>
+	<start name="vbox" priority="-2">}
+append config_of_app "
+		<binary name=\"$virtualbox_binary\"/>"
+append config_of_app {
 		<resource name="RAM" quantum="1280M"/>
 		<config vbox_file="vm_auto_share.vbox" vm_name="AutoDisk">
 			<libc stdout="/dev/log" stderr="/dev/log" rtc="/dev/rtc"/>
diff --git a/repos/ports/run/vbox_win.inc b/repos/ports/run/vbox_win.inc
index c6066396b..7cc63cf8a 100644
--- a/repos/ports/run/vbox_win.inc
+++ b/repos/ports/run/vbox_win.inc
@@ -41,6 +41,10 @@ set boot_modules {
 	dynamic_rom
 }
 
+set virtualbox_binary "virtualbox-rem"
+if {[have_spec muen]} { set virtualbox_binary "virtualbox-muen" }
+if {[have_spec nova]} { set virtualbox_binary "virtualbox-nova" }
+
 set config_of_app {
 
 	<start name="input_merger">
@@ -236,8 +240,8 @@ append config_of_app {
 for { set i 1} { $i <= $use_vms } { incr i} {
 	append config_of_app "
 	<start name=\"vbox${i}\" priority=\"-2\">"
-	append_if [expr $use_vbox4] config_of_app {
-		<binary name="virtualbox" />}
+	append_if [expr $use_vbox4] config_of_app "
+		<binary name=\"$virtualbox_binary\" />"
 	append_if [expr $use_vbox5] config_of_app {
 		<binary name="virtualbox5" />}
 
diff --git a/repos/ports/run/virtualbox.run b/repos/ports/run/virtualbox.run
index 6983f515f..906cf9295 100644
--- a/repos/ports/run/virtualbox.run
+++ b/repos/ports/run/virtualbox.run
@@ -3,6 +3,10 @@ set use_ps2 [have_spec ps2]
 set use_usb 0
 set use_serial 0
 
+set virtualbox_binary "virtualbox-rem"
+if {[have_spec muen]} { set virtualbox_binary "virtualbox-muen" }
+if {[have_spec nova]} { set virtualbox_binary "virtualbox-nova" }
+
 set build_components {
 	core init virtualbox
 	drivers/framebuffer
@@ -116,7 +120,10 @@ append_if [expr $use_serial] config {
 }
 
 append config {
-	<start name="virtualbox" priority="-2">
+	<start name="virtualbox" priority="-2">}
+append config "
+		<binary name=\"$virtualbox_binary\"/>"
+append config {
 		<resource name="RAM" quantum="448M"/>
 		<config vbox_file="test.vbox" vm_name="TestVM">
 			<libc stdout="/dev/log" stderr="/dev/log" rtc="/dev/rtc"/>
@@ -139,7 +146,9 @@ install_config $config
 
 exec cp ${genode_dir}/repos/ports/run/test.vbox bin/.
 
-set boot_modules { core ld.lib.so init timer virtualbox test.iso test.vbox }
+set boot_modules { core ld.lib.so init timer test.iso test.vbox }
+
+append boot_modules $virtualbox_binary
 
 # platform-specific modules
 lappend_if [expr         $use_usb] boot_modules usb_drv
diff --git a/repos/ports/run/virtualbox_auto.inc b/repos/ports/run/virtualbox_auto.inc
index 0d910e490..f61c93a26 100644
--- a/repos/ports/run/virtualbox_auto.inc
+++ b/repos/ports/run/virtualbox_auto.inc
@@ -324,10 +324,10 @@ append boot_modules {
 lappend_if [expr $use_rumpfs] boot_modules rump.lib.so
 lappend_if [expr $use_rumpfs] boot_modules rump_fs.lib.so
 lappend_if [expr $use_rumpfs] boot_modules rump_fs
-lappend_if [expr $use_vbox4] boot_modules virtualbox
+lappend_if [expr $use_vbox4] boot_modules $virtualbox_binary
 lappend_if [expr $use_vbox5] boot_modules virtualbox5
 lappend_if [expr $use_ram_fs || $use_usb] boot_modules ram_fs
-lappend_if [expr $use_ram_fs && !$use_overlay_from_disk] boot_modules ${overlay_image}
+lappend_if [expr $use_ram_fs && !$use_overlay_from_disk] boot_modules $overlay_image
 lappend_if [expr    $use_cpu_load] boot_modules trace_subject_reporter
 lappend_if [expr    $use_cpu_load] boot_modules cpu_load_display
 
diff --git a/repos/ports/src/virtualbox/muen/target.mk b/repos/ports/src/virtualbox/muen/target.mk
new file mode 100644
index 000000000..de1ef1ab4
--- /dev/null
+++ b/repos/ports/src/virtualbox/muen/target.mk
@@ -0,0 +1,9 @@
+TARGET   = virtualbox-muen
+REQUIRES = muen
+
+LIBS    += virtualbox-muen
+
+include $(REP_DIR)/src/virtualbox/target.inc
+
+vpath frontend/% $(REP_DIR)/src/virtualbox/
+vpath %.cc       $(REP_DIR)/src/virtualbox/
diff --git a/repos/ports/src/virtualbox/nova/target.mk b/repos/ports/src/virtualbox/nova/target.mk
new file mode 100644
index 000000000..07a94f04c
--- /dev/null
+++ b/repos/ports/src/virtualbox/nova/target.mk
@@ -0,0 +1,9 @@
+TARGET   = virtualbox-nova
+REQUIRES = nova
+
+LIBS    += virtualbox-nova
+
+include $(REP_DIR)/src/virtualbox/target.inc
+
+vpath frontend/% $(REP_DIR)/src/virtualbox/
+vpath %.cc       $(REP_DIR)/src/virtualbox/
diff --git a/repos/ports/src/virtualbox/target.inc b/repos/ports/src/virtualbox/target.inc
new file mode 100644
index 000000000..2f0e51943
--- /dev/null
+++ b/repos/ports/src/virtualbox/target.inc
@@ -0,0 +1,60 @@
+VBOX_CC_OPT += -DVBOX_WITH_HARDENING
+VBOX_CC_OPT += -DVBOX_WITH_GENERIC_SESSION_WATCHER
+
+include $(REP_DIR)/lib/mk/virtualbox-common.inc
+
+#
+# Prevent inclusion of the Genode::Log definition after the vbox #define
+# of 'Log'. Otherwise, the attemt to compile base/log.h will fail.
+#
+VBOX_CC_OPT += -include base/log.h
+
+CC_WARN += -Wall
+
+SRC_CC = frontend/main.cc frontend/console.cc \
+         frontend/VBoxAPIWrap/MediumFormatWrap.cpp \
+         frontend/VBoxAPIWrap/TokenWrap.cpp \
+         frontend/VirtualBoxErrorInfoImpl.cpp \
+         devices.cc drivers.cc dummies.cc libc.cc \
+         logger.cc mm.cc pdm.cc rt.cc sup.cc iommio.cc ioport.cc \
+         hm.cc thread.cc dynlib.cc unimpl.cc
+
+LIBS  += base
+LIBS  += stdcxx
+
+LIBS  += virtualbox-bios virtualbox-recompiler virtualbox-runtime \
+         virtualbox-vmm virtualbox-devices virtualbox-drivers \
+         virtualbox-storage virtualbox-zlib virtualbox-liblzf \
+         virtualbox-xml virtualbox-main
+
+LIBS  += pthread libc_terminal libc_pipe libiconv
+
+LIBS  += qemu-usb
+
+INC_DIR += $(call select_from_repositories,src/lib/libc)
+INC_DIR += $(call select_from_repositories,src/lib/pthread)
+
+INC_DIR += $(VBOX_DIR)/Runtime/include
+
+SRC_CC += HostServices/SharedFolders/service.cpp
+SRC_CC += HostServices/SharedFolders/mappings.cpp
+SRC_CC += HostServices/SharedFolders/vbsf.cpp
+SRC_CC += HostServices/SharedFolders/shflhandle.cpp
+
+SRC_CC += HostServices/SharedClipboard/service.cpp
+
+SRC_CC += frontend/dummy/errorinfo.cc frontend/dummy/virtualboxbase.cc
+SRC_CC += frontend/dummy/autostart.cc frontend/dummy/rest.cc
+SRC_CC += frontend/dummy/host.cc
+
+INC_DIR += $(VBOX_DIR)/Main/include
+INC_DIR += $(VBOX_DIR)/VMM/include
+
+INC_DIR += $(REP_DIR)/src/virtualbox/frontend
+INC_DIR += $(REP_DIR)/src/virtualbox/frontend/VBoxAPIWrap
+
+INC_DIR += $(VBOX_DIR)/Main/xml
+INC_DIR += $(VBOX_DIR)/HostServices
+
+# search path to 'scan_code_set_2.h'
+INC_DIR += $(call select_from_repositories,src/drivers/input/spec/ps2)
diff --git a/repos/ports/src/virtualbox/target.mk b/repos/ports/src/virtualbox/target.mk
index d7e7cc63a..cfbcee3fd 100644
--- a/repos/ports/src/virtualbox/target.mk
+++ b/repos/ports/src/virtualbox/target.mk
@@ -1,61 +1,5 @@
-VBOX_CC_OPT += -DVBOX_WITH_HARDENING
-VBOX_CC_OPT += -DVBOX_WITH_GENERIC_SESSION_WATCHER
+TARGET   = virtualbox-rem
 
-include $(REP_DIR)/lib/mk/virtualbox-common.inc
+LIBS    += virtualbox-hwaccl-off
 
-#
-# Prevent inclusion of the Genode::Log definition after the vbox #define
-# of 'Log'. Otherwise, the attemt to compile base/log.h will fail.
-#
-VBOX_CC_OPT += -include base/log.h
-
-CC_WARN += -Wall
-
-TARGET = virtualbox
-SRC_CC = frontend/main.cc frontend/console.cc \
-         frontend/VBoxAPIWrap/MediumFormatWrap.cpp \
-         frontend/VBoxAPIWrap/TokenWrap.cpp \
-         frontend/VirtualBoxErrorInfoImpl.cpp \
-         devices.cc drivers.cc dummies.cc libc.cc \
-         logger.cc mm.cc pdm.cc rt.cc sup.cc iommio.cc ioport.cc \
-         hm.cc thread.cc dynlib.cc unimpl.cc
-
-LIBS  += base
-LIBS  += stdcxx
-
-LIBS  += virtualbox-bios virtualbox-recompiler virtualbox-runtime \
-         virtualbox-vmm virtualbox-devices virtualbox-drivers \
-         virtualbox-storage virtualbox-zlib virtualbox-liblzf \
-         virtualbox-hwaccl virtualbox-xml virtualbox-main
-
-LIBS  += pthread libc_terminal libc_pipe libiconv
-
-LIBS  += qemu-usb
-
-INC_DIR += $(call select_from_repositories,src/lib/libc)
-INC_DIR += $(call select_from_repositories,src/lib/pthread)
-
-INC_DIR += $(VBOX_DIR)/Runtime/include
-
-SRC_CC += HostServices/SharedFolders/service.cpp
-SRC_CC += HostServices/SharedFolders/mappings.cpp
-SRC_CC += HostServices/SharedFolders/vbsf.cpp
-SRC_CC += HostServices/SharedFolders/shflhandle.cpp
-
-SRC_CC += HostServices/SharedClipboard/service.cpp
-
-SRC_CC += frontend/dummy/errorinfo.cc frontend/dummy/virtualboxbase.cc
-SRC_CC += frontend/dummy/autostart.cc frontend/dummy/rest.cc
-SRC_CC += frontend/dummy/host.cc
-
-INC_DIR += $(VBOX_DIR)/Main/include
-INC_DIR += $(VBOX_DIR)/VMM/include
-
-INC_DIR += $(REP_DIR)/src/virtualbox/frontend
-INC_DIR += $(REP_DIR)/src/virtualbox/frontend/VBoxAPIWrap
-
-INC_DIR += $(VBOX_DIR)/Main/xml
-INC_DIR += $(VBOX_DIR)/HostServices
-
-# search path to 'scan_code_set_2.h'
-INC_DIR += $(call select_from_repositories,src/drivers/input/spec/ps2)
+include $(REP_DIR)/src/virtualbox/target.inc