Ruby Netbeans plugin can't install
ide, netbeans, plugins, ruby
Solution
When you select your plugins from the unzipped folder, make very sure to change the "Files of Type" filter to "All", so that you can include the JRuby JAR
https://blogs.oracle.com/geertjan/entry/ruby_on_rails_in_netbeans
Problem
Some plugins require plugin org.jruby.jruby to be installed. The plugin named org.jruby.jruby is needed and not found. The following plugin is affected: Ruby Projects Where is org.jruby.jruby? I select all.