--- VirtualBox-5.0.0.orig/src/VBox/Additions/common/VBoxGuestLib/Makefile.kmk 2015-07-09 12:50:54.000000000 +0300 +++ VirtualBox-5.0.0/src/VBox/Additions/common/VBoxGuestLib/Makefile.kmk 2015-07-11 01:13:58.160666199 +0300 @@ -39,10 +39,12 @@ LIBRARIES += \ VBoxGuestR3Lib \ VBoxGuestR3LibShared ifndef VBOX_ONLY_VALIDATIONKIT + ifndef VBOX_USE_SYSTEM_XORG_HEADERS if1of ($(KBUILD_TARGET), freebsd linux netbsd openbsd) LIBRARIES += \ VBoxGuestR3LibXFree86 endif + endif if1of ($(KBUILD_TARGET), freebsd linux netbsd openbsd solaris) LIBRARIES += \ VBoxGuestR3LibXOrg