任何build议如何解决? gem install capybara-webkit -v '0.11.0' Building native extensions. This could take a while… ERROR: Error installing capybara-webkit: ERROR: Failed to build gem native extension. /home/durrantm/.rvm/rubies/ruby-1.9.3-p194/bin/ruby extconf.rb sh: qmake: not found Gem files will remain installed in /home/durrantm/.rvm/gems/ruby-1.9.3-p194/gems/capybara-webkit-0.11.0 for inspection. Results logged to /home/durrantm/.rvm/gems/ruby-1.9.3-p194/gems/capybara-webkit-0.11.0/./gem_make.out