title: Could not find builder-3.0.0 in any of the sources (Bundler::GemNotFound)
body: <p>I've been <a href="http://www.redmine.org/projects/redmine/wiki/RedmineInstall" rel="nofollow">using</a> on my server <a href="http://www.redmine.org" rel="nofollow">Redmine</a> 1.1.x for some time and I'm trying to upgrade it to 2.2.2. I followed the <a href="http://www.redmine.org/projects/redmine/wiki/RedmineUpgrade" rel="nofollow">upgrade sequence</a> and now the application is not working anymore :</p>
  
  <p><code>'block in materialize': Could not find builder-3.0.0 in any of the sources (Bundler::GemNotFound)</code></p>
  
  <p>However:</p>
  
  <pre><code>bicou@ssh:~/redmine-2.2.2$ bundle install
  Using rake (10.0.3)
  Using i18n (0.6.1)
  Using multi_json (1.5.0)
  Using activesupport (3.2.11)
  Using builder (3.0.0)
  Using activemodel (3.2.11)
  Using erubis (2.7.0)
  Using journey (1.0.4)
  Using rack (1.4.4)
  Using rack-cache (1.2)
  Using rack-test (0.6.2)
  Using hike (1.2.1)
  Using tilt (1.3.3)
  Using sprockets (2.2.2)
  Using actionpack (3.2.11)
  Using mime-types (1.19)
  Using polyglot (0.3.3)
  Using treetop (1.4.12)
  Using mail (2.4.4)
  Using actionmailer (3.2.11)
  Using arel (3.0.2)
  Using tzinfo (0.3.35)
  Using activerecord (3.2.11)
  Using activeresource (3.2.11)
  Using coderay (1.0.8)
  Using fastercsv (1.5.5)
  Using icalendar (1.2.1)
  Using rack-ssl (1.3.2)
  Using json (1.7.6)
  Using rdoc (3.12)
  Using thor (0.16.0)
  Using railties (3.2.11)
  Using jquery-rails (2.0.3)
  Using metaclass (0.0.1)
  Using mocha (0.12.3)
  Using mysql (2.8.1)
  Using net-ldap (0.3.1)
  Using pg (0.14.1)
  Using ruby-openid (2.1.8)
  Using rack-openid (1.3.1)
  Using bundler (1.2.3)
  Using rails (3.2.11)
  Using rmagick (2.13.1)
  Using shoulda (2.11.3)
  Using sqlite3 (1.3.7)
  Using yard (0.8.3)
  Your bundle is complete! Use `bundle show [gemname]` to see where a bundled gem is installed.
  bicou@ssh:~/redmine-2.2.2$ bundle show builder
  /home/bicou/gems/gems/builder-3.0.0
  bicou@ssh:~/redmine-2.2.2$ env | grep gem
  GEM_HOME=/home/bicou/gems/
  PATH=/home/bicou/gems/bin:/usr/local/bin:/usr/bin:/bin:/usr/bin/X11:/usr/games
  GEM_PATH=/home/bicou/gems/
  </code></pre>
  
  <p>As you can see, builder v3.0.0 <em>is</em> installed. What gives?</p>
  
  <p>What I did try:</p>
  
  <ul>
  <li>remove Gemfile.lock and run <code>bundle install</code> again</li>
  <li>what Paulo Fidalgo advised (see below)</li>
  </ul>
  
  <p><strong>Based on Paulo Fidalgo advice:</strong></p>
  
  <p>My Gemfile contains builder 3.0.0:</p>
  
  <pre><code>bicou@ssh:~/redmine-2.2.2$ grep builder Gemfile
  gem "builder", "3.0.0"
  bicou@ssh:~/redmine-2.2.2$ bundle update
  Fetching gem metadata from http://rubygems.org/.........
  Fetching gem metadata from http://rubygems.org/..
  Using rake (10.0.3)
  Using i18n (0.6.1)
  Using multi_json (1.5.0)
  Using activesupport (3.2.11)
  Using builder (3.0.0)
  Using activemodel (3.2.11)
  Using erubis (2.7.0)
  Using journey (1.0.4)
  Using rack (1.4.4)
  Using rack-cache (1.2)
  Using rack-test (0.6.2)
  Using hike (1.2.1)
  Using tilt (1.3.3)
  Using sprockets (2.2.2)
  Using actionpack (3.2.11)
  Using mime-types (1.19)
  Using polyglot (0.3.3)
  Using treetop (1.4.12)
  Using mail (2.4.4)
  Using actionmailer (3.2.11)
  Using arel (3.0.2)
  Using tzinfo (0.3.35)
  Using activerecord (3.2.11)
  Using activeresource (3.2.11)
  Using bundler (1.2.3)
  Using coderay (1.0.8)
  Using fastercsv (1.5.5)
  Using icalendar (1.2.1)
  Using rack-ssl (1.3.2)
  Using json (1.7.6)
  Using rdoc (3.12)
  Using thor (0.16.0)
  Using railties (3.2.11)
  Using jquery-rails (2.0.3)
  Using metaclass (0.0.1)
  Using mocha (0.12.3)
  Using mysql (2.8.1)
  Using net-ldap (0.3.1)
  Using pg (0.14.1)
  Using ruby-openid (2.1.8)
  Using rack-openid (1.3.1)
  Using rails (3.2.11)
  Using rmagick (2.13.1)
  Using shoulda (2.11.3)
  Using sqlite3 (1.3.7)
  Using yard (0.8.3)
  Your bundle is updated! Use `bundle show [gemname]` to see where a bundled gem is installed.
  bicou@ssh:~/redmine-2.2.2$
  </code></pre>