title: getting following error while deploying using capistrano
body: <p>I did cap deploy, I'm getting following error, </p>
  
  <pre><code>* executing "cd /home/deployer/apps/nthat1/releases/20130911190337 &amp;&amp; bundle install --gemfile /home/deployer/apps/nthat1/releases/20130911190337/Gemfile --path /home/deployer/apps/nthat1/shared/bundle --deployment --quiet --without development test"
    servers: ["192.241.225.72"]
    [192.241.225.72] executing command
  ** [out :: 192.241.225.72] /home/deployer/.rvm/gems/ruby-1.9.3-p448/gems/psych-1.3.4/lib/psych.rb:96: warning: already initialized constant VERSION
  ** [out :: 192.241.225.72] 
  ** [out :: 192.241.225.72] /home/deployer/.rvm/gems/ruby-1.9.3-p448/gems/psych-1.3.4/lib/psych.rb:99: warning: already initialized constant LIBYAML_VERSION
  ** [out :: 192.241.225.72] 
  ** [out :: 192.241.225.72] Gem::Installer::ExtensionBuildError: ERROR: Failed to build gem native extension.
  ** [out :: 192.241.225.72] 
  ** [out :: 192.241.225.72] 
  ** [out :: 192.241.225.72] /home/deployer/.rvm/rubies/ruby-1.9.3-p448/bin/ruby extconf.rb
  ** [out :: 192.241.225.72] 
  ** [out :: 192.241.225.72] 
  ** [out :: 192.241.225.72] Gem files will remain installed in /home/deployer/apps/nthat1/shared/bundle/ruby/1.9.1/gems/libv8-3.16.14.3 for inspection.
  ** [out :: 192.241.225.72] 
  ** [out :: 192.241.225.72] Results logged to  /home/deployer/apps/nthat1/shared/bundle/ruby/1.9.1/gems/libv8- 3.16.14.3/ext/libv8/gem_make.out
  ** [out :: 192.241.225.72] 
  ** [out :: 192.241.225.72] An error occurred while installing libv8 (3.16.14.3), and Bundler cannot
  ** [out :: 192.241.225.72] 
  ** [out :: 192.241.225.72] continue.
  ** [out :: 192.241.225.72] 
  ** [out :: 192.241.225.72] Make sure that `gem install libv8 -v '3.16.14.3'` succeeds before bundling.
  ** [out :: 192.241.225.72] 
  command finished in 174014ms
  *** [deploy:update_code] rolling back
  * executing "rm -rf /home/deployer/apps/nthat1/releases/20130911190337; true"
  </code></pre>
  
  <p>I logged into the server, and I did gem install libv8 -v '3.16.14.3'</p>
  
  <pre><code>Building native extensions.  This could take a while...
  Successfully installed libv8-3.16.14.3
  1 gem installed
  Installing ri documentation for libv8-3.16.14.3...
  Installing RDoc documentation for libv8-3.16.14.3...
  </code></pre>
  
  <p>Again I did cap deploy I am getting the same error as stated above.</p>