Packaging Perl modules

[Denis Barbier <barbier@imacs.polytechnique.fr>]

Hi,

from http://people.debian.org/~bod/perl-policy/ch-module_packages.html 
   3.3 Vendor Installation
                
      A module should use the following lines in the debian/rules build
      target:
        perl Makefile.PL INSTALLDIRS=vendor
        $(MAKE) OPTIMIZE="-O2 -g -Wall"

But... on ftp-master.debian.org, i ran
   barbier@auric:~$ find /org/ftp.debian.org/ftp/pool/main -name \
     \*.diff.gz -exec grep -l INSTALLDIRS=vendor {} \;
   barbier@auric:~$ 

Did i miss something?
Which package would you consider a good example of module packaging?
Any pointer or RTFM would be helpful ;)

Denis