require 'formula' class Pngcheck < Formula url 'http://downloads.sourceforge.net/project/png-mng/pngcheck/2.3.0/pngcheck-2.3.0.tar.gz' homepage 'http://www.libpng.org/pub/png/apps/pngcheck.html' md5 '980bd6d9a3830fdce746d7fe3c9166ee' def install system 'make pngcheck' bin.install 'pngcheck' end end