Can't locate utils.pm in @INC

Error:
[root@example ~]# /usr/lib64/nagios/plugins/check_ro_mounts
Can't locate utils.pm in @INC (@INC contains: /usr/lib/nagios/plugins /usr/lib64/perl5/site_perl/5.8.8/x86_64-linux-thread-multi /usr/lib/perl5/site_perl/5.8.8 /usr/lib/perl5/site_perl /usr/lib64/perl5/vendor_perl/5.8.8/x86_64-linux-thread-multi /usr/lib/perl5/vendor_perl/5.8.8 /usr/lib/perl5/vendor_perl /usr/lib64/perl5/5.8.8/x86_64-linux-thread-multi /usr/lib/perl5/5.8.8 .) at /usr/lib64/nagios/plugins/check_ro_mounts line 27.
BEGIN failed--compilation aborted at /usr/lib64/nagios/plugins/check_ro_mounts line 27.
[root@example ~]#
Solution:

1.  echo "export PERL5LIB=$PERL5LIB:/usr/lib64/nagios/plugins/" >> /etc/profile.d/nagiosplugins.sh
2.   chmod a+x /etc/profile.d/nagiosplugins.sh
3.  source /etc/profile

 [root@example nagios]# cp -pr /usr/lib64/nagios/plugins/utils.pm /usr/lib/perl5/5.8.8/
[root@example nagios]#
OR
cp -pr /usr/lib64/nagios/plugins/utils.pm /usr/lib64/perl5/
[root@example nagios]# service nrpe restart
Shutting down nrpe:                                        [  OK  ]
Starting nrpe:                                             [  OK  ]
[root@example nagios]#