require 'formula' class RubyBuild < Formula url 'https://github.com/sstephenson/ruby-build/tarball/v20111230' homepage 'https://github.com/sstephenson/ruby-build' md5 '82241efbee5836419446c0ab78596b3a' head 'https://github.com/sstephenson/ruby-build.git' def install ENV['PREFIX'] = prefix system "./install.sh" end end