Installing capybara-webkit (0.5.0) with native extensions /Users/inohiro/.rvm/rubies/ree-1.8.7-2011.03/lib/ruby/site_ruby/1.8/rubygems/installer.rb:551:in `build_extensions': ERROR: Failed to build gem native extension. (Gem::Installer::ExtensionBuildError)
/Users/inohiro/.rvm/rubies/ree-1.8.7-2011.03/bin/ruby extconf.rb
Gem files will remain installed in /Users/inohiro/.rvm/gems/ree-1.8.7-2011.03/gems/capybara-webkit-0.5.0 for inspection.
Results logged to /Users/inohiro/.rvm/gems/ree-1.8.7-2011.03/gems/capybara-webkit-0.5.0/./gem_make.out
from /Users/inohiro/.rvm/rubies/ree-1.8.7-2011.03/lib/ruby/site_ruby/1.8/rubygems/installer.rb:504:in `each'
from /Users/inohiro/.rvm/rubies/ree-1.8.7-2011.03/lib/ruby/site_ruby/1.8/rubygems/installer.rb:504:in `build_extensions'
from /Users/inohiro/.rvm/rubies/ree-1.8.7-2011.03/lib/ruby/site_ruby/1.8/rubygems/installer.rb:180:in `install'
from /Users/inohiro/.rvm/gems/ree-1.8.7-2011.03/gems/bundler-1.0.18/lib/bundler/source.rb:101:in `install'
from /Users/inohiro/.rvm/gems/ree-1.8.7-2011.03/gems/bundler-1.0.18/lib/bundler/rubygems_integration.rb:78:in `preserve_paths'
from /Users/inohiro/.rvm/gems/ree-1.8.7-2011.03/gems/bundler-1.0.18/lib/bundler/source.rb:91:in `install'
from /Users/inohiro/.rvm/gems/ree-1.8.7-2011.03/gems/bundler-1.0.18/lib/bundler/installer.rb:58:in `run'
from /Users/inohiro/.rvm/gems/ree-1.8.7-2011.03/gems/bundler-1.0.18/lib/bundler/rubygems_integration.rb:93:in `with_build_args'
from /Users/inohiro/.rvm/gems/ree-1.8.7-2011.03/gems/bundler-1.0.18/lib/bundler/installer.rb:57:in `run'
from /Users/inohiro/.rvm/gems/ree-1.8.7-2011.03/gems/bundler-1.0.18/lib/bundler/installer.rb:49:in `run'
from /Users/inohiro/.rvm/gems/ree-1.8.7-2011.03/gems/bundler-1.0.18/lib/bundler/installer.rb:8:in `install'
from /Users/inohiro/.rvm/gems/ree-1.8.7-2011.03/gems/bundler-1.0.18/lib/bundler/cli.rb:220:in `install'
from /Users/inohiro/.rvm/gems/ree-1.8.7-2011.03/gems/bundler-1.0.18/lib/bundler/vendor/thor/task.rb:22:in `send'
from /Users/inohiro/.rvm/gems/ree-1.8.7-2011.03/gems/bundler-1.0.18/lib/bundler/vendor/thor/task.rb:22:in `run'
from /Users/inohiro/.rvm/gems/ree-1.8.7-2011.03/gems/bundler-1.0.18/lib/bundler/vendor/thor/invocation.rb:118:in `invoke_task'
from /Users/inohiro/.rvm/gems/ree-1.8.7-2011.03/gems/bundler-1.0.18/lib/bundler/vendor/thor.rb:263:in `dispatch'
from /Users/inohiro/.rvm/gems/ree-1.8.7-2011.03/gems/bundler-1.0.18/lib/bundler/vendor/thor/base.rb:386:in `start'
from /Users/inohiro/.rvm/gems/ree-1.8.7-2011.03/gems/bundler-1.0.18/bin/bundle:13
from /Users/inohiro/.rvm/gems/ree-1.8.7-2011.03/bin/bundle:19:in `load'
from /Users/inohiro/.rvm/gems/ree-1.8.7-2011.03/bin/bundle:19
