require 'formula' class ChibiScheme < Formula url 'http://chibi-scheme.googlecode.com/files/chibi-scheme-0.5.3.tgz' homepage 'http://code.google.com/p/chibi-scheme/' md5 '26941ff819ee51056c700d94b7cb95c0' head 'https://code.google.com/p/chibi-scheme/', :using => :hg def install # "make" and "make install" must be done separately system "make" system "make install PREFIX=#{prefix}" end end