11.2R-P10 make installworld "failing"

[thefronny]

I have compiled the -P10 source and installed the kernel. But make installworld is dying with this:

===> libexec/bootpd/tools (install)
===> libexec/bootpd/tools/bootpef (install)
install -s -o root -g wheel -m 555 bootpef /usr/sbin/bootpef
strip: creation of /usr/sbin/bootpef failed: Operation not permitted
install: strip command strip failed on /usr/sbin/bootpef
*** Error code 70

Stop.
make[7]: stopped in /usr/src/libexec/bootpd/tools/bootpef
*** Error code 1

bootpef is there, correct date, and permissions and flags check out, but since the installworld stopped I have no idea how much might remain uncompleted. FWIW, the same process on 12.0R-P4 went fine.

Thanks!