MRuby::GemBox.new do |conf|
  conf.gem :core => "mruby-sprintf"
  conf.gem :core => "mruby-print"

  Dir.glob("#{root}/mrbgems/mruby-*/mrbgem.rake") do |x|
    g = File.basename File.dirname x
    conf.gem :core => g unless g =~ /^mruby-(print|sprintf|bin-debugger|test)$/
  end
end