Sure, it works on your machine. But how confident are you that your Linux servers provide the same runtime environment as your Mac laptop? And when there's a security hole somewhere in your app stack, how quickly and safely can you upgrade to fix it? How much happier would you be if you could generate identical software configurations for your dev and prod boxen, no matter what OS they run?

Stop crossing your fingers that brew-ing here and apt-get-ing there will produce matching results. You deserve DevOps happiness! Learn how to pronounce "pkgsrc" -- and how a practical, proven cross-platform package manager can save you from the kind of surprises that ruin your week.