なんか以下の方法でビルドできるらしい。メモ https://groups.google.com/forum/#!topic/rubyinstaller/A92K_EYJX2A/discussion Hello, Since I started RubyInstaller 4 years ago, ensuring that Ruby worked on every single release took time. Back then, my hardware was limited, so running Ruby tests took a considerable amount of time (more than one cup of tea using tea cups scale). Not only that, even after 4 years and different