Building nginx 1.8.0, linking to local-install of Openssl, 'nginx -V' still reports "built with" *sy

I’m building nginx 1.8.0 on linux/64.

I have openssl 1.0.2a built locally, and installed into /usr/local/ssl

which openssl

I’ve configured nginx build with


–with-cc-opt=’… -I/usr/local/ssl/include -I/usr/local/include’
–with-ld-opt=’-L/usr/local/ssl/lib64 -Wl,-rpath,/usr/local/ssl/lib64
-lssl -lcrypto -ldl -lz’

checking after build/install, the intended ssl libs ARE correctly linked

ldd objs/nginx | egrep -i “ssl|crypto” => /usr/local/ssl/lib64/
(0x00007f9cedd2b000) => /usr/local/ssl/lib64/

But ‘nginx -V’ references BOTH the system-installed OpenSSL 1.0.1k-fips,
and ‘my’ OpenSSL 1.0.2a

nginx -V
nginx version: nginx/1.8.0
built with OpenSSL 1.0.1k-fips 8 Jan 2015 (running with OpenSSL
1.0.2a 19 Mar 2015)
TLS SNI support enabled
configure arguments: …

I want to ensure that the system-installed OpenSSL 1.0.1k-fips is
completely UNinvolved.

What needs to change in the build/config to make sure that it’s not?