Düzeltmek için nasıl bir önerin var mı?

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

Bunu Ubuntu

sudo apt-get install qt4-dev-tools libqt4-dev libqt4-core libqt4-gui

Mac üzerinde iseniz

brew install qt

ve sonra

gem install capybara-webkit -v '0.11.0'