require 'formula' class GnuTar < Formula url 'ftp://ftp.gnu.org/gnu/tar/tar-1.22.tar.gz' homepage 'http://www.gnu.org/software/tar/' md5 'efafad1b256e3de410f4fce5335d9c9d' def install system "./configure", "--prefix=#{prefix}", "--program-prefix=g", "--mandir=#{man}" system "make install" end end