require 'formula' class RubyBuild < Formula url 'https://github.com/sstephenson/ruby-build/tarball/v20111030' homepage 'https://github.com/sstephenson/ruby-build' md5 '3e0dd83a807de34ba83876cf25630fd1' head 'https://github.com/sstephenson/ruby-build.git' def install ENV['PREFIX'] = prefix system "./install.sh" end end