"Error: Architecture mismatch"?

I'm updating netb/bind914 from pkgsrc on a system running NetBSD 8.1 with 
nothing extra in mk.conf, and it's failing with:

libtool: compile:  gcc -I/usr/pkgsrc/net/bind914/work/bind-9.14.3 -I../.. 
-I./unix/include -I./pthreads/include -I./include 
-I/usr/pkgsrc/net/bind914/work/bind-9.14.3/lib/dns/include 
-I../../lib/dns/include -O2 -D_FORTIFY_SOURCE=2 -pthread -fPIC -W -Wall 
-Wmissing-prototypes -Wcast-qual -Wwrite-strings -Wformat -Wpointer-arith 
-fno-strict-aliasing -fno-delete-null-pointer-checks -c rwlock.c  -fPIC 
-DPIC -o .libs/rwlock.o
/var/tmp//ccKVmYBr.s: Assembler messages:
/var/tmp//ccKVmYBr.s:435: Error: Architecture mismatch on "pause".
/var/tmp//ccKVmYBr.s:435:  (Requires v9e|v9v|v9m; requested architecture 
is v9a.)
*** Error code 1

Stop.
make[2]: stopped in /usr/pkgsrc/net/bind914/work/bind-9.14.3/lib/isc


Thoughts?

John