[otrs] Update @INC in OTRS?

[Jeff Baughn]

I have updated my Perl installation, but I can't seem to get OTRS
to recognize this. I was having problems getting mail using the
PostMaster.pl script, so I ran cat ../doc/test-email | ./PostMaster.pl
and got the following:

# cat ../doc/test-email-1.box | ./PostMaster.pl
ERROR: OTRS-PM-01 Perl: 5.8.0 OS: linux Time: Tue Mar  6 17:19:13 2007

Message: install_driver(mysql) failed: Can't locate loadable object  
for module DBD::mysql
in @INC (@INC contains: /opt/otrs/Kernel/cpan-lib /opt/otrs
/usr/lib/perl5/5.8.0/i386-linux-thread-multi /usr/lib/perl5/5.8.0
/usr/lib/perl5/site_perl/5.8.0/i386-linux-thread-multi  
/usr/lib/perl5/site_perl/5.8.0
/usr/lib/perl5/site_perl  
/usr/lib/perl5/vendor_perl/5.8.0/i386-linux-thread-multi
/usr/lib/perl5/vendor_perl/5.8.0 /usr/lib/perl5/vendor_perl .) at  
(eval 47) line 3
Compilation failed in require at (eval 47) line 3, <PRODUCT> line 4.
Perhaps a module that DBD::mysql requires hasn't been fully installed
  at /opt/otrs/Kernel/System/DB.pm line 191


  Traceback (20129):
    Module: ./PostMaster.pl (v1.19) Line: 131

The problem here is that when I run perl -V, my @INC shows up as:

  @INC:
     /usr/local/perl-5.8.7/lib/5.8.7/i686-linux
     /usr/local/perl-5.8.7/lib/5.8.7
     /usr/local/perl-5.8.7/lib/site_perl/5.8.7/i686-linux
     /usr/local/perl-5.8.7/lib/site_perl/5.8.7
     /usr/local/perl-5.8.7/lib/site_perl
     .

How can I force OTRS to use the correct @INC variable?

Thank you in advance.