make installworld failed

[Joe Demeny]

After building world and kernel, installed kernel, but got an error when I 
tried make installworld:

# make installworld
mkdir -p /tmp/install.uV1yfKEs
for prog in [ awk cap_mkdb cat chflags chmod chown  date echo egrep find grep 
install-info  ln lockf make mkdir mtree mv pwd_mkdb rm sed sh sysctl  test 
true uname wc zic; do  cp `which $prog` /tmp/install.uV1yfKEs;  done
cd /usr/src; MAKEOBJDIRPREFIX=/usr/obj  MACHINE_ARCH=i386  MACHINE=i386  
CPUTYPE=  GROFF_BIN_PATH=/usr/obj/usr/src/tmp/legacy/usr/bin  
GROFF_FONT_PATH=/usr/obj/usr/src/tmp/legacy/usr/share/groff_font  
GROFF_TMAC_PATH=/usr/obj/usr/src/tmp/legacy/usr/share/tmac  
PATH=/usr/obj/usr/src/tmp/legacy/usr/sbin:/usr/obj/usr/src/tmp/legacy/usr/bin:/usr/obj/usr/src/tmp/legacy/usr/games:/usr/obj/usr/src/tmp/usr/sbin:/usr/obj/usr/src/tmp/usr/bin:/usr/obj/usr/src/tmp/usr/games:/tmp/install.uV1yfKEs /usr/obj/usr/src/make.i386/make -f 
Makefile.inc1 reinstall
awk: Permission denied
"/usr/src/Makefile.inc1", line 101: 
warning: "awk '/^#define[[:space:]]*__FreeBSD_version/ { print 
$3 }'  /usr/include/osreldate.h" returned non-zero status
echo:Permission denied
*** Error code 1

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

Stop in /usr/src.

This is FreeBSD 6.3-PRERELEASE (just installed new kernel...)

I'm wondering why do I get this error?

-- 
Joe Demeny