Revert "Revert "Merge pull request #4 from zendesk/amckenzie/env-ruby""

This reverts commit 246de147ee746145f78c450e5049241013eb8630.
Revert "Revert "Merge pull request #5 from zendesk/amckenzie/env-ruby-2""

This reverts commit 4552d77af0ad11648471a69426ac16dc9dc4176d.
v1.6.7