```
[] ~/projects/jruby-launcher $ JRUBY_HOME=~/.rvm/rubies/jruby-9.2.11.0/ ./jruby -S irb
2020-03-09T15:06:05.388-05:00 [main] WARN FilenoUtil : Native subprocess control requires open access to sun.nio.ch
Pass '--add-opens java.base/sun.nio.ch=org.jruby.dist' or '=org.jruby.core' to enable.
Ignoring executable-hooks-1.6.0 because its extensions are not built. Try: gem pristine executable-hooks --version 1.6.0
Ignoring gem-wrappers-1.4.0 because its extensions are not built. Try: gem pristine gem-wrappers --version 1.4.0
Ignoring jruby-launcher-1.1.10-java because its extensions are not built. Try: gem pristine jruby-launcher --version 1.1.10
jruby-9.1.17.0 :001 > exit
```