ruby on rails - Jenkins docker cache not working -

i'm trying build docker file under jenkins docker build .

here docker file:

# docker-version 0.10.0 docker-index.my.com/ruby:1.9.3 maintainer my.com  # never install ruby gem docs run echo "gem: --no-rdoc --no-ri" >> ~/.gemrc  run mkdir /my_app workdir /my_app  run gem install bundler run gem install bluepill  add gemfile /my_app/gemfile add gemfile.lock /my_app/gemfile.lock run bundle install add . /my_app 

note i'm using common caching method bundle install, cache works locally not on jenkins build, problem of running under jenkins?