kernel: install: mps.ko.symbols: No such file or directory

Building kernel and modules with CLANG (did not try with gcc) results in 
corrupted system with following error message. Operating system is most 
recent svn update of FreeBSD 9.0-CURRENT/amd64:

URL: svn://svn.freebsd.org/base/head
Repository Root: svn://svn.freebsd.org/base
Repository UUID: ccf9f872-aa2e-dd11-9fc8-001c23d0bc1f
Revision: 222199
Node Kind: directory
Schedule: normal
Last Changed Author: rmacklem
Last Changed Rev: 222199
Last Changed Date: 2011-05-22 23:04:32 +0200 (So, 22 Mai 2011)


The error is:

===> mps (install)
install -o root -g wheel -m 555   mps.ko /boot/kernel
install -o root -g wheel -m 555   mps.ko.symbols /boot/kernel
install: mps.ko.symbols: No such file or directory
*** Error code 71

Stop in /usr/src/sys/modules/mps.
*** Error code 1

Stop in /usr/src/sys/modules.
*** Error code 1

Stop in /usr/obj/usr/src/sys/THOR.
*** Error code 1

Stop in /usr/src.
*** Error code 1

Stop in /usr/src.