I've got a problem with installing capybara-webkit. When I try gem install capybara-webkit the following error occurs
ERROR: Error installing capybara-webkit: ERROR: Failed to build gem native extension. C:/Ruby193/bin/ruby.exe extconf.rb
ruby v 1.9.3 p194, qt 4.7.4 (also tried with 4.8)
Thanks in advance for your help
Finally, I've fixed it by downloading the latest sources from github and compiling the gem manually.