require 'formula' class Muscle < Formula url 'http://www.drive5.com/muscle/downloads3.8.31/muscle3.8.31_src.tar.gz' homepage 'http://www.drive5.com/muscle/' md5 'f767f00fd15f0c5db944d41936779e10' version '3.8.31' def install Dir.chdir "src" system "make" bin.install "muscle" end end