illumos gate

i have in my illumos.sh:
export NIGHTLY_OPTIONS='-nCprt'

try to build only src/uts/intel by command:
ksh93 bldenv.sh -d illumos.sh -c "cd usr/src/uts/intel/ && dmake -m serial install"

but build failed with:
dmake: Fatal error: Don't know how to make target `../../i86pc/genassym/debug64/assym.h'
Current working directory /myshare/builds/dilos-illumos-gate/dilos-illumos-gate/usr/src/uts/intel/nskern

build not failed if to use:
./nightly illumos.sh

but partial build failed.
it is not NFS build, it is build on local file system by 'lofs' mount to build zone.