and although I do try to install DevKit , Idea upon trying to load the debugging gems still complains: "Failed to Install Gems. Following gems were not installed: C:\Users\Charles\AppData\Local\JetBrains\Toolbox\apps\IDEA-U\ch-0\201.6668.13.plugins\ruby\rb\gems\ruby-debug-ide-0.7.1.beta3.gem: Error installing ruby-debug-ide-0.7.1.beta3.gem: ERROR: Failed to build gem native extension. current directory: C:/jruby-9.2.11.1/lib/ruby/gems/shared/gems/ruby-debug-ide-0.7.1.beta3/ext C:/jruby-9.2.11.1/bin/jruby.exe mkrf_conf.rb current directory: C:/jruby-9.2.11.1/lib/ruby/gems/shared/gems/ruby-debug-ide-0.7.1.beta3/ext C:jruby-9.2.11.1binjruby.exe -S rake RUBYARCHDIR\=C:/jruby-9.2.11.1/lib/ruby/gems/shared/extensions/universal-java-1.8/2.5.0/ruby-debug-ide-0.7.1.beta3 RUBYLIBDIR\=C:/jruby-9.2.11.1/lib/ruby/gems/shared/extensions/universal-java-1.8/2.5.0/ruby-debug-ide-0.7.1.beta3 rake failedCannot run program "C:jruby-9.2.11.1binjruby.exe" (in directory "C:\jruby-9.2.11.1\lib\ruby\gems\shared\gems\ruby-debug-ide-0.7.1.beta3\ext"): CreateProcess error=2, The system cannot find the file specified Gem files will remain installed in C:/jruby-9.2.11.1/lib/ruby/gems/shared/gems/ruby-debug-ide-0.7.1.beta3 for inspection. Results logged to C:/jruby-9.2.11.1/lib/ruby/gems/shared/extensions/universal-java-1.8/2.5.0/ruby-debug-ide-0.7.1.beta3/gem_make.out  Native compilation failed. Please make sure that you have Ruby DevKit installed "