require 'formula' class RubyBuild < Formula homepage 'https://github.com/sstephenson/ruby-build' url 'https://github.com/sstephenson/ruby-build/tarball/v20121022' sha1 '925b8eee613076f0b36bd9612a1dfb2abe03ff3f' head 'https://github.com/sstephenson/ruby-build.git' def install ENV['PREFIX'] = prefix system "./install.sh" end end