Redmine

Hello,

I make this tutorial :

https://jbox-web.github.io/redmine_git_hosting/howtos/install/#step-by-step-installation

1. Install gems and migrate database

redmine$ cd REDMINE_ROOT
redmine$ bundle install --without development test

I have a problème with the last the last commande. I try to remove /opt/redmine/GemFile.loke, I install the gem rake 1.6.0 and rake 1.4.1, actionpack, i test with rails 3.2.21, but without success, so I execute 'gem clean'.

But i have this error :

Updating https://github.com/jbox-web/gitolite-rugged.git
Updating https://github.com/jbox-web/grack.git
Fetching gem metadata from https://rubygems.org/........
Fetching version metadata from https://rubygems.org/..
Resolving dependencies......
Bundler could not find compatible versions for gem "rack":
  In Gemfile:
    gitlab-grack (>= 0) ruby depends on
      rack (~> 1.4.1) ruby

    rails (= 4.2.0) ruby depends on
      actionpack (= 4.2.0) ruby depends on
        rack (1.6.0)

Have someone got an idea? I searched a lot...I'm under Debian.