Как установить iconv-devel на CentOS 5.6?

После установки rvm на CentOS 5.6 и запустите rvm notes :

dependencies:
  # For RVM
  rvm: yum install -y bash curl git # NOTE: For git you need the EPEL repository enabled

  # For Ruby (MRI & Ree) you should install the following OS dependencies:
  ruby: yum install -y gcc-c++ patch readline readline-devel zlib zlib-devel libyaml-devel libffi-devel openssl-devel ;
        yum install -y make bzip2 ;
        yum install -y iconv-devel # NOTE: For centos 5.4 final iconv-devel might not be available :(

Однако iconv-devel не может быть найден:

Setting up Install Process
No package iconv-devel available.
Nothing to do

Как его установить?