/usr/lib/ruby/ is in debci 1.7.1.
This file is owned by root:root, with mode 0o755.
..
/usr/lib/ruby/vendor_ruby/
/usr/lib/ruby/vendor_ruby/debci/
/usr/lib/ruby/vendor_ruby/debci/blacklist.rb
/usr/lib/ruby/vendor_ruby/debci/config.rb
/usr/lib/ruby/vendor_ruby/debci/graph.rb
/usr/lib/ruby/vendor_ruby/debci/html/
/usr/lib/ruby/vendor_ruby/debci/html/blacklist.erb
/usr/lib/ruby/vendor_ruby/debci/html/history.erb
/usr/lib/ruby/vendor_ruby/debci/html/index.erb
/usr/lib/ruby/vendor_ruby/debci/html/layout.erb
/usr/lib/ruby/vendor_ruby/debci/html/package.erb
/usr/lib/ruby/vendor_ruby/debci/html/packagelist.erb
/usr/lib/ruby/vendor_ruby/debci/html/packages.erb
/usr/lib/ruby/vendor_ruby/debci/html/platform_specific_issues.erb
/usr/lib/ruby/vendor_ruby/debci/html/status.erb
/usr/lib/ruby/vendor_ruby/debci/html/status_alerts.erb
/usr/lib/ruby/vendor_ruby/debci/html/status_nav.erb
/usr/lib/ruby/vendor_ruby/debci/html.rb
/usr/lib/ruby/vendor_ruby/debci/package.rb
/usr/lib/ruby/vendor_ruby/debci/repository.rb
/usr/lib/ruby/vendor_ruby/debci/status.rb
/usr/lib/ruby/vendor_ruby/debci.rb