perl -V
...
  Built under msys
  Compiled at Apr 26 2011 22:23:07
  %ENV:
    PERL5LIB="/home/username/myperllibs/lib/perl5:"
    CYGWIN=""
  @INC:
    /home/username/myperllibs/lib/perl5
    /usr/lib/perl5/5.8/msys
    /usr/lib/perl5/5.8
    /usr/lib/perl5/site_perl/5.8/msys
    /usr/lib/perl5/site_perl/5.8
    /usr/lib/perl5/site_perl/5.8
    /usr/lib/perl5/vendor_perl/5.8/msys
    /usr/lib/perl5/vendor_perl/5.8
    /usr/lib/perl5/vendor_perl/5.8
    .