spamassassin doesn't use modified @INC

[Stefan Jakobs]

Hello list,

I'm in the progress of setting up a new Server with amavisd-new and 
spamassassin. I like to run the recent versions of this programms, but 
therefore I need some perl modules from cpan (e.g. IP::Country::Fast), because 
they are not in the repository of my distribution (SLES 11). 
The guy who installed these modules, installed them in /usr/local/perl/
and they should be available in perl:
# perl -V
Summary of my perl5 (revision 5 version 10 subversion 0) configuration:
(...)
  %ENV:
    PERL5LIB="/usr/local/perl/lib:/usr/local/perl/lib/arch"
  @INC:
    /usr/local/perl/lib
    /usr/local/perl/lib/arch
    /usr/lib/perl5/5.10.0/x86_64-linux-thread-multi
    /usr/lib/perl5/5.10.0
    /usr/lib/perl5/site_perl/5.10.0/x86_64-linux-thread-multi
    /usr/lib/perl5/site_perl/5.10.0
    /usr/lib/perl5/vendor_perl/5.10.0/x86_64-linux-thread-multi
    /usr/lib/perl5/vendor_perl/5.10.0
    /usr/lib/perl5/vendor_perl

# perl -we 'use IP::Country::Fast; print $IP::Country::Fast::VERSION,"\n"'
604.001

But spamassassin (and amavisd) doesn't find the additional modules.

[9427] dbg: metadata: failed to load 'IP::Country::Fast', skipping (Can't 
locate IP/Country/Fast.pm in @INC (@INC contains: lib 
/usr/lib/perl5/vendor_perl/5.10.0/x86_64-linux-thread-multi 
/usr/lib/perl5/vendor_perl/5.10.0 /usr/lib/perl5/5.10.0/x86_64-linux-thread-
multi /usr/lib/perl5/5.10.0 /usr/lib/perl5/site_perl/5.10.0/x86_64-linux-
thread-multi /usr/lib/perl5/site_perl/5.10.0 /usr/lib/perl5/vendor_perl) at 
/usr/lib/perl5/vendor_perl/5.10.0/Mail/SpamAssassin/Plugin/RelayCountry.pm 
line 68.

My question is now: How can I tell spamassassin to use the right (modified) 
@INC array?

Greetings
Stefan

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