diff -Nurp VirtualBox-4.3.0.p21/Config.kmk VirtualBox-4.3.0.p22/Config.kmk
--- VirtualBox-4.3.0.p21/Config.kmk	2013-10-15 23:53:29.326927851 +0300
+++ VirtualBox-4.3.0.p22/Config.kmk	2013-10-16 00:01:00.002084073 +0300
@@ -2741,20 +2741,20 @@ VBOXLNX32GUEST_SUFF_LIB = .a
 #
 # SDKs for external libraries.
 #
-SDK_VBOX_LIBXML2          = .
-SDK_VBOX_LIBXML2_INCS   ?= $(PATH_ROOT)/src/libs/libxml2-2.6.31/include
+SDK_VBOX_LIBXML2        = .
+SDK_VBOX_LIBXML2_INCS  ?= /usr/include/libxml2
 SDK_VBOX_LIBXML2_DEFS  ?= _REENTRANT
 SDK_VBOX_LIBXML2_DEFS.win += WIN32 _WINDOWS _MBCS
 # note: no linking to LIB here, we do that explicitly in src/VBox/Runtime/Makefile.kmk to link
 # libxml against VBoxRT
 
 SDK_VBOX_LIBPNG       = .
-SDK_VBOX_LIBPNG_INCS ?= $(PATH_ROOT)/src/libs/libpng-1.2.8
+SDK_VBOX_LIBPNG_INCS ?= /usr/include/libpng15
 SDK_VBOX_LIBPNG_LIBS ?= $(PATH_STAGE_LIB)/VBox-libpng$(VBOX_SUFF_LIB)
 
 SDK_VBOX_ZLIB         = .
 if1of ($(KBUILD_TARGET), os2 solaris win)
- SDK_VBOX_ZLIB_INCS  ?= $(PATH_ROOT)/src/libs/zlib-1.2.6
+ SDK_VBOX_ZLIB_INCS  ?= /usr/include/
  SDK_VBOX_ZLIB_LIBS  ?= $(PATH_STAGE_LIB)/VBox-zlib$(VBOX_SUFF_LIB)
 else
  SDK_VBOX_ZLIB_INCS  ?=