rubygems 3.4.19 for ruby 3.2 and include an operating_system.rb
Provide a vendored operating_system.rb which supersedes the /etc/gemrc configuration for setting the user-install options. Also remove the so de-duplication patch by using install_extension_in_lib.
Furthermore check for the existence of --build-root to run gem without options. In near future, this all will replace the need for using gem --no-user-install, --bin-dir and --install-dir with the gemdir.
Fixes #3 (closed) #4 (closed)