我需要使用 ruby 1.8.6 来运行旧脚本。我已经安装了 NetBeans 6.9.1，我正在尝试使用快速调试器，但是当我尝试安装它时，我得到：
/home/eianni/.rvm/gems/ruby-1.8.6-p420@xml2rpc/gems/rubygems-bundler-0.3.0/lib/rubygems_bundler/regenerate_binstubs_command.rb:34: warning: parenthesize argument(s) for future version
Building native extensions. This could take a while...
ERROR: Error installing ruby-debug-ide:
ERROR: Failed to build gem native extension.
/home/eianni/.rvm/rubies/ruby-1.8.6-p420/bin/ruby mkrf_conf.rb
/home/eianni/.rvm/gems/ruby-1.8.6-p420@xml2rpc/gems/rubygems-bundler-0.3.0/lib/rubygems_bundler/regenerate_binstubs_command.rb:34: warning: parenthesize argument(s) for future version
Gem files will remain installed in /home/eianni/.rvm/rubies/ruby-1.8.6-p420/lib/ruby/gems/1.8/gems/ruby-debug-ide-0.4.9 for inspection.
Results logged to /home/eianni/.rvm/rubies/ruby-1.8.6-p420/lib/ruby/gems/1.8/gems/ruby-debug-ide-0.4.9/ext/gem_make.out
这可能是因为 ruby 版本太旧了，但是有没有办法告诉 Netbeans 为 ruby-debug-ide 使用不同的版本。我可以安装没有问题ruby-debug-ide 0.10.0。
我正在使用 Ubuntu 10.04