title: Capistrano bundler:install fails
body: <p>I'm trying to deploy my rails app into an EC2 instance using Capistrano 3.0. I'm now stack with the following output which appears when running "cap production deploy" or "cap production bundler:install".</p>
  
  <pre><code>DEBUG [5b379979] Running /usr/bin/env if test ! -d /var/www/app/current; then echo "Directory does not exist '/var/www/app/current'" 1&gt;&amp;2; false; fi on ec2-75-101-200-185.compute-1.amazonaws.com
  DEBUG [5b379979] Command: if test ! -d /var/www/app/current; then echo "Directory does not exist '/var/www/app/current'" 1&gt;&amp;2; false; fi
  DEBUG [5b379979] Finished in 2.285 seconds command successful.
   INFO [f15c9f08] Running /usr/bin/env bundle --gemfile /var/www/app/current/Gemfile --path /var/www/app/shared/bundle --deployment --verbose --binstubs /var/www/billtune/shared/bin --without development test on ec2-75-101-200-185.compute-1.amazonaws.com
  DEBUG [f15c9f08] Command: cd /var/www/app/current &amp;&amp; /usr/bin/env bundle --gemfile /var/www/app/current/Gemfile --path /var/www/app/shared/bundle --deployment --verbose --binstubs /var/www/app/shared/bin --without development test
  DEBUG [f15c9f08]    /usr/bin/env: 
  DEBUG [f15c9f08]    bundle
  DEBUG [f15c9f08]    : No such file or directory
  DEBUG [f15c9f08]    
  cap aborted!
  bundle stdout: Nothing written
  bundle stderr: Nothing written
  /Users/shaimo-mbp/.rvm/gems/ruby-1.9.3-p448/gems/sshkit-1.0.0/lib/sshkit/command.rb:94:in `exit_status='
  /Users/shaimo-mbp/.rvm/gems/ruby-1.9.3-p448/gems/sshkit-1.0.0/lib/sshkit/backends/netssh.rb:125:in `block (4 levels) in _execute'
  /Users/shaimo-mbp/.rvm/gems/ruby-1.9.3-p448/gems/net-ssh-2.7.0/lib/net/ssh/connection/channel.rb:551:in `call'
  /Users/shaimo-mbp/.rvm/gems/ruby-1.9.3-p448/gems/net-ssh-2.7.0/lib/net/ssh/connection/channel.rb:551:in `do_request'
  /Users/shaimo-mbp/.rvm/gems/ruby-1.9.3-p448/gems/net-ssh-2.7.0/lib/net/ssh/connection/session.rb:561:in `channel_request'
  /Users/shaimo-mbp/.rvm/gems/ruby-1.9.3-p448/gems/net-ssh-2.7.0/lib/net/ssh/connection/session.rb:465:in `dispatch_incoming_packets'
  /Users/shaimo-mbp/.rvm/gems/ruby-1.9.3-p448/gems/net-ssh-2.7.0/lib/net/ssh/connection/session.rb:221:in `preprocess'
  /Users/shaimo-mbp/.rvm/gems/ruby-1.9.3-p448/gems/net-ssh-2.7.0/lib/net/ssh/connection/session.rb:205:in `process'
  /Users/shaimo-mbp/.rvm/gems/ruby-1.9.3-p448/gems/net-ssh-2.7.0/lib/net/ssh/connection/session.rb:169:in `block in loop'
  /Users/shaimo-mbp/.rvm/gems/ruby-1.9.3-p448/gems/net-ssh-2.7.0/lib/net/ssh/connection/session.rb:169:in `loop'
  /Users/shaimo-mbp/.rvm/gems/ruby-1.9.3-p448/gems/net-ssh-2.7.0/lib/net/ssh/connection/session.rb:169:in `loop'
  /Users/shaimo-mbp/.rvm/gems/ruby-1.9.3-p448/gems/net-ssh-2.7.0/lib/net/ssh/connection/channel.rb:269:in `wait'
  /Users/shaimo-mbp/.rvm/gems/ruby-1.9.3-p448/gems/sshkit-1.0.0/lib/sshkit/backends/netssh.rb:147:in `block (2 levels) in _execute'
  /Users/shaimo-mbp/.rvm/gems/ruby-1.9.3-p448/gems/net-ssh-2.7.0/lib/net/ssh/connection/channel.rb:514:in `call'
  /Users/shaimo-mbp/.rvm/gems/ruby-1.9.3-p448/gems/net-ssh-2.7.0/lib/net/ssh/connection/channel.rb:514:in `do_open_confirmation'
  /Users/shaimo-mbp/.rvm/gems/ruby-1.9.3-p448/gems/net-ssh-2.7.0/lib/net/ssh/connection/session.rb:545:in `channel_open_confirmation'
  /Users/shaimo-mbp/.rvm/gems/ruby-1.9.3-p448/gems/net-ssh-2.7.0/lib/net/ssh/connection/session.rb:465:in `dispatch_incoming_packets'
  /Users/shaimo-mbp/.rvm/gems/ruby-1.9.3-p448/gems/net-ssh-2.7.0/lib/net/ssh/connection/session.rb:221:in `preprocess'
  /Users/shaimo-mbp/.rvm/gems/ruby-1.9.3-p448/gems/net-ssh-2.7.0/lib/net/ssh/connection/session.rb:205:in `process'
  /Users/shaimo-mbp/.rvm/gems/ruby-1.9.3-p448/gems/net-ssh-2.7.0/lib/net/ssh/connection/session.rb:169:in `block in loop'
  /Users/shaimo-mbp/.rvm/gems/ruby-1.9.3-p448/gems/net-ssh-2.7.0/lib/net/ssh/connection/session.rb:169:in `loop'
  /Users/shaimo-mbp/.rvm/gems/ruby-1.9.3-p448/gems/net-ssh-2.7.0/lib/net/ssh/connection/session.rb:169:in `loop'
  /Users/shaimo-mbp/.rvm/gems/ruby-1.9.3-p448/gems/sshkit-1.0.0/lib/sshkit/backends/netssh.rb:149:in `block in _execute'
  /Users/shaimo-mbp/.rvm/gems/ruby-1.9.3-p448/gems/sshkit-1.0.0/lib/sshkit/backends/netssh.rb:106:in `tap'
  /Users/shaimo-mbp/.rvm/gems/ruby-1.9.3-p448/gems/sshkit-1.0.0/lib/sshkit/backends/netssh.rb:106:in `_execute'
  /Users/shaimo-mbp/.rvm/gems/ruby-1.9.3-p448/gems/sshkit-1.0.0/lib/sshkit/backends/netssh.rb:54:in `execute'
  /Users/shaimo-mbp/.rvm/gems/ruby-1.9.3-p448/gems/capistrano-bundler-1.0.0/lib/capistrano/tasks/bundler.cap:20:in `block (4 levels) in &lt;top (required)&gt;'
  /Users/shaimo-mbp/.rvm/gems/ruby-1.9.3-p448/gems/sshkit-1.0.0/lib/sshkit/backends/abstract.rb:81:in `within'
  /Users/shaimo-mbp/.rvm/gems/ruby-1.9.3-p448/gems/capistrano-bundler-1.0.0/lib/capistrano/tasks/bundler.cap:19:in `block (3 levels) in &lt;top (required)&gt;'
  /Users/shaimo-mbp/.rvm/gems/ruby-1.9.3-p448/gems/sshkit-1.0.0/lib/sshkit/backends/netssh.rb:42:in `instance_exec'
  /Users/shaimo-mbp/.rvm/gems/ruby-1.9.3-p448/gems/sshkit-1.0.0/lib/sshkit/backends/netssh.rb:42:in `run'
  /Users/shaimo-mbp/.rvm/gems/ruby-1.9.3-p448/gems/sshkit-1.0.0/lib/sshkit/runners/parallel.rb:12:in `block (2 levels) in execute'
  Tasks: TOP =&gt; bundler:install
  </code></pre>
  
  <p>When ssh-ing into the server and running the same command ("cd /var/www/app/current &amp;&amp; /usr/bin/env bundle --gemfile /var/www/app/current/Gemfile --path /var/www/app/shared/bundle --deployment --verbose --binstubs /var/www/app/shared/bin --without development test") all seems to be ok...</p>
  
  <p>Getting quite desperate about this...
  Thanks!</p>