/usr/lib/ruby/ is in ruby-compass-rails 2.0.5-5.
This file is owned by root:root, with mode 0o755.
..
/usr/lib/ruby/vendor_ruby/
/usr/lib/ruby/vendor_ruby/compass-rails/
/usr/lib/ruby/vendor_ruby/compass-rails.rb
/usr/lib/ruby/vendor_ruby/compass-rails/configuration.rb
/usr/lib/ruby/vendor_ruby/compass-rails/patches/
/usr/lib/ruby/vendor_ruby/compass-rails/patches.rb
/usr/lib/ruby/vendor_ruby/compass-rails/patches/3_1.rb
/usr/lib/ruby/vendor_ruby/compass-rails/patches/4_0.rb
/usr/lib/ruby/vendor_ruby/compass-rails/patches/compass.rb
/usr/lib/ruby/vendor_ruby/compass-rails/patches/importer.rb
/usr/lib/ruby/vendor_ruby/compass-rails/patches/sass_importer.rb
/usr/lib/ruby/vendor_ruby/compass-rails/patches/sprite_importer.rb
/usr/lib/ruby/vendor_ruby/compass-rails/patches/static_compiler.rb
/usr/lib/ruby/vendor_ruby/compass-rails/railties/
/usr/lib/ruby/vendor_ruby/compass-rails/railties.rb
/usr/lib/ruby/vendor_ruby/compass-rails/railties/3_1.rb
/usr/lib/ruby/vendor_ruby/compass-rails/railties/4_0.rb
/usr/lib/ruby/vendor_ruby/compass-rails/version.rb