適当に書き始めたけど define の中で rpm_package が使えないのはなんでなの

mysql_package.rb

#
# Cookbook Name:: mysql
# Definition:: mysql_package
#
# Copyright 2013, YOUR_COMPANY_NAME
#
# All rights reserved - Do Not Redistribute

define :mysql_package do

  execute "install-#{params[:name]}" do

    package       = params[:name]
    version       = node['mysql']['version']
    minor_version = version.to_f
    arch          = node[:kernel][:machine]

    rpm_file = "MySQL-#{package}-#{version}-1.linux_glibc2.5.#{arch}.rpm"

    remote_file "#{Chef::Config[:file_cache_path]}/#{rpm_file}" do
      source "http://dev.mysql.com/get/Downloads/MySQL-#{minor_version}/#{rpm_file}/from/http://cdn.mysql.com/"
      not_if "rpm -qa | grep -q '^MySQL-#{package}'"
      notifies :install, "rpm_package[mysql-#{package}]", :immediately
    end

    rpm_package "mysql-#{package}" do
      source "#{Chef::Config[:file_cache_path]}/#{rpm_file}"
      only_if { ::File.exists?("#{Chef::Config[:file_cache_path]}/#{rpm_file}")}
      action :nothing
    end

    file "mysql-#{package}-cleanup" do
      path "#{Chef::Config[:file_cache_path]}/#{rpm_file}"
      action :delete
    end

  end

end