How to install puppet devel version from yum?

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http://serverfault.com – In /etc/yum.repos.d/puppet.repo have I put [puppetlabs] name=Puppet Labs Packages baseurl=http://yum.puppetlabs.com/el/$releasever/devel/$basearch/ enabled=1 gpgcheck=1 gpgkey=http://yum.puppetlabs.com/RPM-GPG-KEY-puppetlabs and when I do yum info puppet-server it doesn't mention puppet-server-3.0.0-0.1rc3 as being an option despite it is in the repository http://yum.puppetlabs.com/el/6/devel/x86_64/ What am I doing wrong? Using CentOS 6.3 64bit. (HowTos)