require 'formula' class Libarchive < Formula homepage 'http://www.libarchive.org' url 'http://www.libarchive.org/downloads/libarchive-3.1.2.tar.gz' sha1 '6a991777ecb0f890be931cec4aec856d1a195489' keg_only :provided_by_osx def install system "./configure", "--prefix=#{prefix}", "--without-lzma", "--without-lzo2", "--without-nettle", "--without-xml2" system "make install" end end