I'm having a problem with running bundler. The deploy completes deploy:symlink:linked_dirs and then fails on bundler:install:

 01 RBENV_ROOT=$HOME/.rbenv RBENV_VERSION=2.4.2 $HOME/.rbenv/bin/rbenv exec bundle install --path /home/ubuntu/rails/<APPLICATION>/current/bin/bundle --without development test --deployment --quiet --binstubs
 01 rbenv: bundle: command not found

I've tried installing it manually with rbenv exec gem install bundler and rbenv rehash, but the executable bundle does not appear.

capistrano 3.10.0
capistrano-rbenv 2.1.3
capistrano-bundler 1.3.0
capistrano-rails 1.3.0
rails 4.2.10
rbenv 1.1.1