require 'formula' class Yacas < Formula homepage 'http://yacas.sourceforge.net' url 'http://yacas.sourceforge.net/backups/yacas-1.3.3.tar.gz' sha1 '749952102f5321d62788be8ae459c1a67078b33d' option "with-server", "Build the network server version" def install args = [ "--prefix=#{prefix}" ] args << "--enable-server" if build.with? "server" system "./configure", *args system "make install" end end