Hi Antonio, Thanks for that awesome walk-though and findings! Where would you stand on having gem2deb-test-runner moving out the Gemfile.lock like it does with lib for autopkgtest mode? I don't see a lot of value in keeping the Gemfile.lock in an environment where the gems are system-packaged. (Happy to do a MR if you think it would be a good path to use). Thanks for your help, Joseph