Hey Guys,
Tried installing the capybara-webkit gem today on Ubuntu (Precise 12.04.1 LTS (GNU/Linux 3.2.0-32-virtual x86_64)) and ran into the following error
Gem::Installer::ExtensionBuildError: ERROR: Failed to build gem native extension.
I needed to install the libqt4-dev package, after running the following my problems were gone :)
sudo apt-get install libqt4-dev
-Matt
10 Dec 2012