# File lib/packaging/util/version.rb, line 225
    def el_version
      if File.exists?('/etc/fedora-release')
        nil
      elsif File.exists?('/etc/redhat-release')
        rpm = Pkg::Util::Tool.find_tool('rpm', :required => true)
        return %x{#{rpm} -q --qf \"%{VERSION}\" $(#{rpm} -q --whatprovides /etc/redhat-release )}
      end
    end