osrg upgrade: missing dts.h

[Keith Beattie]

Working through the xorg upgrade, the base problem that seems to be
preventing the recommended 'portupgrade' commands from finishing properly
for me is: 'dts.h: No such file or directory'.

On the chance that this alone rings any bells as to what the problem (and
fix) might be please let me know, otherwise I can produce more details:
build logs, /var/db/pkg contents, etc.

# uname -a
FreeBSD foo.example.org 6.2-RELEASE-p1 FreeBSD 6.2-RELEASE-p1 #0: Fri Feb 23
11:59:36 PST 2007     root@:/usr/obj/usr/src/sys/FOO  i386

TIA,
ksb