It is recommended to just use EverPwnage instead

ohd - HomeDepot patcher script to jailbreak A5(X) iOS 8.x

Once patched, HomeDepot will be able to jailbreak not just iOS 8.4.1, but also all of iOS 8.0 to 8.4. For A5(X) devices only: iPhone 4S, iPad 2, 3, mini, iPod touch 5.

Usage instructions are in the README