buildworld failure

hi there,

has anybody seen this buildworld failure?

===> sys/modules/portalfs (depend)
_at_ -> /usr/git-freebsd-head/sys
machine -> /usr/git-freebsd-head/sys/amd64/include
x86 -> /usr/git-freebsd-head/sys/x86/include
awk -f _at_/tools/vnode_if.awk _at_/kern/vnode_if.src -p
awk -f _at_/tools/vnode_if.awk _at_/kern/vnode_if.src -q
awk -f _at_/tools/vnode_if.awk _at_/kern/vnode_if.src -h
rm -f .depend
CC='clang' mkdep -f .depend -a   -nostdinc -DSTRIP_FBSDID -D_KERNEL -DKLD_MODULE -I. -I_at_ -I_at_/contrib/altq /usr/git-freebsd-head/sys/modules/portalfs/../../fs/portalfs/portal_vfsops.c /usr/git-freebsd-head/sys/modules/portalfs/../../fs/portalfs/portal_vnops.c
/usr/git-freebsd-head/sys/modules/portalfs/../../fs/portalfs/portal_vnops.c:41:10: fatal error: 'opt_capsicum.h' file not found
#include "opt_capsicum.h"
         ^
1 error generated.
mkdep: compile failed
*** Error code 1
1 error
*** Error code 2
1 error
*** Error code 2
1 error
*** Error code 2
1 error
*** Error code 2
1 error
*** Error code 2
1 error

cheers.
alex