title: no such file to load -- initializer (LoadError)
body: <p>I have following installed on ubuntu 12</p>
  
  <ul>
  <li>ruby 1.9.2p320</li>
  <li>Rails 3.2.6</li>
  </ul>
  
  <p>Now I have old project which is developed into Rails 2 &amp; Ruby 1.8.7</p>
  
  <p><strong>Problem:</strong> </p>
  
  <p>When i run below command under old project root directory</p>
  
  <pre><code>ruby ./script/plugin install git://github.com/rails/rails_upgrade.git
  </code></pre>
  
  <p>Following error comes</p>
  
  <pre><code>Invalid gemspec in [/usr/local/rvm/gems/ruby-1.9.2-p320/specifications/ZenTest-4.9.1.gemspec]: Illformed requirement ["&lt; 2.1, &gt;= 1.8"]
  /usr/local/rvm/rubies/ruby-1.9.2-p320/lib/ruby/site_ruby/1.9.1/rubygems/custom_require.rb:55:in `require': no such file to load -- initializer (LoadError)
          from /usr/local/rvm/rubies/ruby-1.9.2-p320/lib/ruby/site_ruby/1.9.1/rubygems/custom_require.rb:55:in `require'
          from /var/www/project/client/softwallet/config/boot.rb:54:in `load_initializer'
          from /var/www/project/client/softwallet/config/boot.rb:38:in `run'
          from /var/www/project/client/softwallet/config/boot.rb:11:in `boot!'
          from /var/www/project/client/softwallet/config/boot.rb:109:in `&lt;top (required)&gt;'
          from &lt;internal:lib/rubygems/custom_require&gt;:29:in `require'
          from &lt;internal:lib/rubygems/custom_require&gt;:29:in `require'
          from ./script/plugin:2:in `&lt;main&gt;'
  </code></pre>