Rails one-click app and Unicorn

Hi,

We just push a patch on our server. The patch actually require from our Gemfile a git repo using a specific branch as follow:

gem 'valid_email2', github: 'wamland-team/valid_email2', branch: 'feature-mx-whitelist'

When restarting the server, and especially unicorn; we’ve got the following error in the log:

E, [2016-12-12T19:56:39.640894 #30255] ERROR -- : reaped #<Process::Status: pid 30522 exit 1> worker=1
I, [2016-12-12T19:56:39.641112 #30255]  INFO -- : worker=1 spawning...
E, [2016-12-12T19:56:39.805898 #30525] ERROR -- : git://github.com/wamland-team/valid_email2.git (at feature-mx-whitelist) is not yet checked out. Run `bundle install` first. (Bundler::GitError)
/usr/local/rvm/gems/ruby-2.2.1@global/gems/bundler-1.8.4/lib/bundler/source/git.rb:192:in `rescue in load_spec_files'
/usr/local/rvm/gems/ruby-2.2.1@global/gems/bundler-1.8.4/lib/bundler/source/git.rb:189:in `load_spec_files'
/usr/local/rvm/gems/ruby-2.2.1@global/gems/bundler-1.8.4/lib/bundler/source/path.rb:92:in `local_specs'
/usr/local/rvm/gems/ruby-2.2.1@global/gems/bundler-1.8.4/lib/bundler/source/git.rb:159:in `specs'
/usr/local/rvm/gems/ruby-2.2.1@global/gems/bundler-1.8.4/lib/bundler/lazy_specification.rb:53:in `__materialize__'
/usr/local/rvm/gems/ruby-2.2.1@global/gems/bundler-1.8.4/lib/bundler/spec_set.rb:88:in `block in materialize'
/usr/local/rvm/gems/ruby-2.2.1@global/gems/bundler-1.8.4/lib/bundler/spec_set.rb:85:in `map!'
/usr/local/rvm/gems/ruby-2.2.1@global/gems/bundler-1.8.4/lib/bundler/spec_set.rb:85:in `materialize'
/usr/local/rvm/gems/ruby-2.2.1@global/gems/bundler-1.8.4/lib/bundler/definition.rb:132:in `specs'
/usr/local/rvm/gems/ruby-2.2.1@global/gems/bundler-1.8.4/lib/bundler/definition.rb:177:in `specs_for'
/usr/local/rvm/gems/ruby-2.2.1@global/gems/bundler-1.8.4/lib/bundler/definition.rb:166:in `requested_specs'
/usr/local/rvm/gems/ruby-2.2.1@global/gems/bundler-1.8.4/lib/bundler/environment.rb:18:in `requested_specs'
/usr/local/rvm/gems/ruby-2.2.1@global/gems/bundler-1.8.4/lib/bundler/runtime.rb:13:in `setup'
/usr/local/rvm/gems/ruby-2.2.1@global/gems/bundler-1.8.4/lib/bundler.rb:122:in `setup'
/etc/unicorn.conf:10:in `block in reload'

NOTE: We did ran bundle install during the deploy.

Idea? Thanks