Hi Pavel, I am testing Rails 5.2.0 now seeing below document. https://fedoraproject.org/wiki/Changes/Ruby_on_Rails_5.2 I have 2 questions for you. I installed Rails 5.2 with group install. $ mock -r fedora-rawhide-x86_64 --dnf-cmd group install 'Ruby on Rails' ... ========================================================================================================= Group Packages ========================================================================================================= Marking packages as installed by the group: @Ruby on Rails rubygem-uglifier rubygem-selenium-webdriver rubygem-spring-watcher-listen ruby-devel rubygem-abrt rubygem-json rubygem-sqlite3 rubygem-byebug rubygem-listen rubygem-sass-rails rubygem-puma rubygem-turbolinks rubygem-web-console nodejs rubygem-jbuilder rubygem-rails rubygem-spring rubygem-bcrypt rubygem-capybara .... Then my question is it seems that rubygem-coffee-rails is not marked as the group. even though it is included in https://pagure.io/fedora-comps/blob/master/f/comps-f29.xml.in#_5204 Do you know why? My 2nd question is it seems chromedriver-helper gem is in the app's Gemfile from Rails 5.2.0. Do you have a plan to do RPM packaging for this gem? https://github.com/rails/rails/blob/v5.2.0/railties/lib/rails/generators/... Thanks. -- Jun Aruga jaruga(a)redhat.com