باید مخاذن EPEL رو نصب کنید:
## RHEL/CentOS 5 32-Bit ##
# wget http://download.fedoraproject.org/pu...5-4.noarch.rpm
# rpm -ivh epel-release-5-4.noarch.rpm

## RHEL/CentOS 5 64-Bit ##
# wget http://download.fedoraproject.org/pu...5-4.noarch.rpm
# rpm -ivh epel-release-5-4.noarch.rpm