Problem with buildkernel today's sources: directory

Just for information, I supped a couple of times this morning and
continued to get the following error when I got to buildkernel.

make -V CFILES -V SYSTEM_CFILES -V GEN_CFILES -V GEN_M_CFILES | 
MKDEP_CPP="cc -E" CC="cc" xargs mkdep -a -f .newdep -O -pipe
-march=pentium4 -Wall -Wredundant-decls -Wnested-externs
-Wstrict-prototypes  -Wmissing-prototypes -Wpointer-arith -Winline
-Wcast-qual  -fformat-extensions -std=c99 -g -nostdinc -I-  -I.
-I/usr/src/sys -I/usr/src/sys/contrib/dev/acpica
-I/usr/src/sys/contrib/ipfilter -I/usr/src/sys/contrib/pf
-I/usr/src/sys/contrib/dev/ath -I/usr/src/sys/contrib/dev/ath/freebsd
-I/usr/src/sys/contrib/ngatm -D_KERNEL -include opt_global.h
-fno-common -finline-limit=8000  -mno-align-long-strings
-mpreferred-stack-boundary=2 -ffreestanding
/usr/src/sys/cam/scsi/scsi_da.c:33:20: opt_da.h: No such file or
directory
mkdep: compile failed
*** Error code 1

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

ed