site_perl directory naming changed from RHEL5 to RHEL6

Issue

On RHEL 5.x, the @INC path on /usr/bin/perl looks like this:

@INC:

/usr/lib64/perl5/site_perl/5.8.8/x86_64-linux-thread-multi

/usr/lib/perl5/site_perl/5.8.8

/usr/lib64/perl5/site_perl/5.8.5/x86_64-linux-thread-multi

/usr/lib/perl5/site_perl/5.8.5

/usr/lib/perl5/site_perl

/usr/lib64/perl5/vendor_perl/5.8.8/x86_64-linux-thread-multi

/usr/lib/perl5/vendor_perl/5.8.8

/usr/lib64/perl5/vendor_perl/5.8.5/x86_64-linux-thread-multi

/usr/lib/perl5/vendor_perl

/usr/lib64/perl5/5.8.8/x86_64-linux-thread-multi

/usr/lib/perl5/5.8.8

.

On RHEL 6.2, it's this:

@INC:

/usr/local/lib64/perl5

/usr/local/share/perl5

/usr/lib64/perl5/vendor_perl

/usr/share/perl5/vendor_perl

/usr/lib64/perl5

/usr/share/perl5

.

site_perl is missing! This breaks a lot of our scripts, since most third-party RPMs drop modules in site_perl. And since RedHat doesn't build perl with -Dusesitecustomize it is not a trivial problem to work around. How is RedHat recommending people migrate site_perl stuff? Am I seriously supposed to modify and reroll every CPAN package in my environment?