..snip..
Basically you regenerate the srpm on the architecture you're building
on, and then run yum-builddep on it:
1) yumdownloader --source rpm
2) rpm -i rpm-4.8.1-5.fc14.src.rpm
3) rpmbuild -bs ~/rpmbuild/SPECS/rpm.spec
4) yum-builddep on the srpm resulting from step 3)
5) finally build the thing
Aaah! I needed to build from spec.
It worked!
Thank you
Jitesh