Install Gems from Vendor Cache

I’m using Bundler with Capistrano to deploy my application. In spite of
the fact Capistrano executes bundle install with the flag ‘–local’,
gems from the vendor cache are NOT installed into the shared bundle
path. Instead I’m notified that:

Some gems seem to be missing from your vendor/cache directory.

Could not find libv8- in any of the sources

libv8- is definitely located in the vendor cache. Does anyone
know why bundler won’t install the gems from the cache?

The full (bundler) command Capistrano executes is below.

cd /home/ari/apps/air/releases/20120209214139 && bundle install
–gemfile /home/ari/apps/air/releases/20120209214139/Gemfile --path
/home/ari/apps/air/shared/bundle --deployment --local --quiet --without
development test