emulators/virtualbox-ose-kmod refuses to build

[Aryeh Friedman]

===>>> All >> virtualbox-ose-kmod-4.1.22 (5/44)

===>  Cleaning for virtualbox-ose-kmod-4.2.6
===>  License GPLv2 accepted by the user
===>  Found saved configuration for virtualbox-ose-kmod-4.1.22
=> VirtualBox-4.2.6.tar.bz2 doesn't seem to exist in /usr/ports/distfiles//.
=> Attempting to fetch
http://download.virtualbox.org/virtualbox/4.2.6/VirtualBox-4.2.6.tar.bz2
VirtualBox-4.2.6.tar.bz2                      100% of   72 MB   29 kBps 00m00s
===>  Extracting for virtualbox-ose-kmod-4.2.6
=> SHA256 Checksum OK for VirtualBox-4.2.6.tar.bz2.
===>  Patching for virtualbox-ose-kmod-4.2.6
===>  Applying FreeBSD patches for virtualbox-ose-kmod-4.2.6
===>   virtualbox-ose-kmod-4.2.6 depends on executable: yasm - found
===>   virtualbox-ose-kmod-4.2.6 depends on executable: as86 - found
===>   virtualbox-ose-kmod-4.2.6 depends on executable: kmk - found
===>  Configuring for virtualbox-ose-kmod-4.2.6
Checking for environment: Determined build machine: freebsd.x86,
target machine: freebsd.x86, OK.
Checking for kBuild: found, OK.
Checking for gcc: found version 4.2.1, OK.
Checking for Open Watcom:
  ** Open Watcom was not found!
Checking for iasl: found version 20110527, OK.
Checking for xslt: found, OK.
Checking for mkisofs: found mkisofs 3.00 (i386-unknown-freebsd9.0)
Copyright (C) 1993-1997 Eric Youngdale (C) 1997-2010 J�rg Schilling,
OK.
Checking for pthread: found, OK.
Checking for libxml2: found version 2.7.8, OK.
Checking for libIDL: found version 0.8.14, OK.
Checking for ssl: found version OpenSSL 0.9.8x 10 May 2012, OK.
Checking for libcurl: found version 7.24.0, OK.
Checking for zlib: found version 1.2.7, OK.
Checking for libpng: found version 1.5.13, OK.
Checking for Java support: OK.

Successfully generated
'/usr/ports/emulators/virtualbox-ose-kmod/work/VirtualBox-4.2.6/AutoConfig.kmk'
and '/usr/ports/emulators/virtualbox-ose-kmod/work/VirtualBox-4.2.6/env.sh'.
Source '/usr/ports/emulators/virtualbox-ose-kmod/work/VirtualBox-4.2.6/env.sh'
once before you start to build VBox:

  source /usr/ports/emulators/virtualbox-ose-kmod/work/VirtualBox-4.2.6/env.sh
  kmk


  +++ WARNING +++ WARNING +++ WARNING +++ WARNING +++ WARNING +++ WARNING +++
  Hardening is enabled which means that the VBox binaries will not run from
  the binary directory. The binaries have to be installed suid root and some
  more prerequisites have to be fulfilled which is normally done by installing
  the final package. For development, the hardening feature can be disabled
  by specifying the --disable-hardening parameter. Please never disable that
  feature for the final distribution!
  +++ WARNING +++ WARNING +++ WARNING +++ WARNING +++ WARNING +++ WARNING +++

Enjoy!
===>  Building for virtualbox-ose-kmod-4.2.6
cd /usr/ports/emulators/virtualbox-ose-kmod/work/VirtualBox-4.2.6 &&
/bin/sh env.sh && cd
/usr/ports/emulators/virtualbox-ose-kmod/work/VirtualBox-4.2.6/src/VBox/HostDrivers
&& VBOX_LIBPATH_X11=/usr/local VBOX_FREEBSD_SRC=/usr/src/sys
/usr/local/bin/kmk HostDrivers-scripts vboxdrv-mod VBoxNetFlt-src
VBoxNetAdp-src
../../../Config.kmk:158: *** You must update kBuild! Requires kBuild
revision 2577 or later, found 2546 (0.1.9998-r2546).  Stop.
*** [do-build] Error code 2

Stop in /usr/ports/emulators/virtualbox-ose-kmod.
*** [build] Error code 1

Stop in /usr/ports/emulators/virtualbox-ose-kmod.