/usr/lib/ is in ruby-webpack-rails 0.9.11-1.
This file is owned by root:root, with mode 0o755.
..
/usr/lib/ruby/
/usr/lib/ruby/vendor_ruby/
/usr/lib/ruby/vendor_ruby/generators/
/usr/lib/ruby/vendor_ruby/generators/webpack_rails/
/usr/lib/ruby/vendor_ruby/generators/webpack_rails/install_generator.rb
/usr/lib/ruby/vendor_ruby/tasks/
/usr/lib/ruby/vendor_ruby/tasks/webpack.rake
/usr/lib/ruby/vendor_ruby/webpack/
/usr/lib/ruby/vendor_ruby/webpack/rails/
/usr/lib/ruby/vendor_ruby/webpack/rails/helper.rb
/usr/lib/ruby/vendor_ruby/webpack/rails/manifest.rb
/usr/lib/ruby/vendor_ruby/webpack/rails/version.rb
/usr/lib/ruby/vendor_ruby/webpack/rails.rb
/usr/lib/ruby/vendor_ruby/webpack/railtie.rb
/usr/lib/ruby/vendor_ruby/webpack-rails.rb