saltstack/salt — pull request #1592 by cluther (2012-07-09 03:46:14+00:00)
Title: Support pkg module on Amazon Linux.

I found that due to /etc/redhat-release not existing in Amazon Linux that the yumpkg module would not be enabled. Considering that Amazon Linux is very close to CentOS 6 and supports yum, it seemed like an easy fix to make it work.