selinux-policy.spec wierdness?

Am looking at selinux-policy-2.2.38-1.src.rpm.  Does anybody know
why there isn't a %build section in the .SPEC file?  I was *hoping*
to do a 'rpmbuild -bc' to assist in debugging an outstanding problem
I'm having with strict policy, but apparently all the building gets
done in the %install. Blech.