rebuilding 7.2.3 srpm on RedHat 8.0

I'm having a problem rebuilding postgresql-7.2.3-1PGDG.src.rpm
on RedHat 8.0 as a non-root user. Anyone know what's up with this??
I'm not subscribed to the list, so please cc me!

Adam

rpm -Uvh postgresql-7.2.3-1PGDG.src.rpm

cd ~/redhat/SPECS

rpmbuild -ba \
--define 'tcl 0' \
--define 'tkpkg 0' \
--define 'pltcl 0' \
--define 'pgaccess 0' \
postgresql.spec
...
...
make[1]: Leaving directory
`/home/adam/redhat/BUILD/postgresql-7.2.3/contrib/vacuumlo'
make: Leaving directory
`/home/adam/redhat/BUILD/postgresql-7.2.3/contrib'
+ make PREFIX=/var/tmp/postgresql-7.2.3-root/usr -C src/interfaces/perl5
-f Makefile install
make: Entering directory
`/home/adam/redhat/BUILD/postgresql-7.2.3/src/interfaces/perl5'
Warning: You do not have permissions to install into
/usr/lib/perl5/site_perl/5.8.0/i386-linux-thread-multi at
/usr/lib/perl5/5.8.0/ExtUtils/Install.pm line 84.
mkdir /usr/lib/perl5/site_perl/5.8.0/i386-linux-thread-multi/auto:
Permission denied at /usr/lib/perl5/5.8.0/ExtUtils/Install.pm line 137
make: *** [pure_site_install] Error 255
make: Leaving directory
`/home/adam/redhat/BUILD/postgresql-7.2.3/src/interfaces/perl5'
error: Bad exit status from /var/tmp/rpm-tmp.83194 (%install)


RPM build errors:
    Bad exit status from /var/tmp/rpm-tmp.83194 (%install)