Unexpected extra care needed for building BIND 9.18.8

[Niall O'Reilly]

Building BIND 9.18.8 from source seems to need

./configure; LD_RUN_PATH=/usr/local/lib make; sudo make install

instead of the traditional

./configure; make; sudo make install

Using the traditional recipe, I obtained the run-time error message

named: error while loading shared libraries: libisc-9.18.8.so: cannot 
open shared object file: No such file or directory

Is this as intended?

I would have expected that ./configure (or the machinery
it invokes) would take care of propagating ${exec_prefix}/lib
to LD_RUN_PATH at the relevant stage.

/Niall