Using net-scp 1.1.0
Using net-sftp 2.1.1
Using net-ssh-gateway 1.2.0
Using capistrano 2.14.1
Installing nokogiri 1.5.9

Gem::Installer::ExtensionBuildError: ERROR: Failed to build gem native extension.

        /usr/bin/ruby1.9.1 extconf.rb

Gem files will remain installed in /var/lib/gems/1.9.1/gems/ffi-1.0.11 for inspection.
Results logged to /var/lib/gems/1.9.1/gems/ffi-1.0.11/ext/ffi_c/gem_make.out
An error occurred while installing ffi (1.0.11), and Bundler cannot continue.
Make sure that `gem install ffi -v '1.0.11'` succeeds before bundling.
root@vps:~/snorby#