error installing modular xorg in 4.0

["Siju George" <sgeorge.ml%gmail.com@localhost>]

Hi I was following

http://wiki.netbsd.se/How_to_install_modular_Xorg

# cat /etc/mk.conf
X11_TYPE=modular
#
 but i get this error.
how do i fix the issue?

Thanks

siju

==================================================================

checking pkg-config is at least version 0.9.0... yes
checking for XKBCOMP... configure: error: Package requirements (x11
xkbfile) were not met:

No package 'x11' found
No package 'xkbfile' found

Consider adjusting the PKG_CONFIG_PATH environment variable if you
installed software in a non-standard prefix.

Alternatively, you may set the environment variables XKBCOMP_CFLAGS
and XKBCOMP_LIBS to avoid the need to call pkg-config.
See the pkg-config man page for more details.

*** Error code 1

Stop.
make: stopped in /usr/pkgsrc/x11/xkbcomp
*** Error code 1

Stop.
make: stopped in /usr/pkgsrc/x11/xkbcomp
*** Error code 1

Stop.
make: stopped in /usr/pkgsrc/x11/xkbdata
*** Error code 1

Stop.
make: stopped in /usr/pkgsrc/x11/modular-xorg-server
#

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