require 'formula' class Pstree < Formula url 'ftp://ftp.thp.uni-duisburg.de/pub/source/pstree-2.33.tar.gz' homepage 'http://freshmeat.net/projects/pstree/' sha1 '2f29ea2618cb6fd90529a543a94ed89b79db58b8' def install system "make pstree" bin.install "pstree" end end