Debian package builds on Wheezy and Precise (both Ruby 1.9.3) are failing to pack bundler files:

11:15:39 /usr/bin/bundle pack
11:15:40 Fetching gem metadata from https://rubygems.org/........
11:15:49 Fetching gem metadata from https://rubygems.org/..
11:15:51 Bundler could not find compatible versions for gem "tins":
11:15:51 In Gemfile:
11:15:51 rubocop (= 0.35.1) ruby depends on
11:15:51 tins (<= 1.6.0) ruby
11:15:51
11:15:51 term-ansicolor (>= 0) ruby depends on
11:15:51 tins (1.7.0)