In perl5.002beta1 /usr/local/lib/site_perl/archname is in @INC by default
but not /usr/local/lib/site_perl. SITEARCH_EXP is defined in config.h but
SITELIB_EXP is not.
but not /usr/local/lib/site_perl. SITEARCH_EXP is defined in config.h but
SITELIB_EXP is not.