title: Can't update RubyGems
body: <p>I'm having difficulties updating RubyGems from version 1.1.1 to newest. I've tried the following:</p>
  
  <blockquote>
    <p>gem update</p>
  </blockquote>
  
  <p><strong>Result:</strong></p>
  
  <blockquote>
    <p>Updating installed gems<br>
    Bulk updating Gem source index for: <a href="http://gems.rubyforge.org/" rel="noreferrer">http://gems.rubyforge.org/</a><br>
    Nothing to update</p>
  </blockquote>
  
  <p>and</p>
  
  <blockquote>
    <p>gem install rubygems-update</p>
  </blockquote>
  
  <p><strong>Result:</strong></p>
  
  <blockquote>
    <p>Bulk updating Gem source index for: <a href="http://gems.rubyforge.org/" rel="noreferrer">http://gems.rubyforge.org/</a><br>
    Bulk updating Gem source index for: <a href="http://gems.rubyforge.org/" rel="noreferrer">http://gems.rubyforge.org/</a><br>
    ERROR:  Error installing rubygems-update:<br>
    &nbsp;&nbsp;&nbsp;&nbsp;rubygems-update requires builder (>= 0)</p>
  </blockquote>
  
  <p>and</p>
  
  <blockquote>
    <p>gem install rubygems-update update_rubygems</p>
  </blockquote>
  
  <p><strong>Result:</strong></p>
  
  <blockquote>
    <p>Bulk updating Gem source index for: <a href="http://gems.rubyforge.org/" rel="noreferrer">http://gems.rubyforge.org/</a><br>
    Bulk updating Gem source index for: <a href="http://gems.rubyforge.org/" rel="noreferrer">http://gems.rubyforge.org/</a><br>
    ERROR:  Error installing rubygems-update:<br>
    &nbsp;&nbsp;&nbsp;&nbsp;rubygems-update requires builder (>= 0)<br>
    ERROR:  could not find update_rubygems locally or in a repository</p>
  </blockquote>
  
  <p>Then I checked, as suggested by <em>theIV</em> on a similar question, whether I had <a href="http://gems.rubyforge.org/" rel="noreferrer">http://gems.rubyforge.org/</a> in my remote sources. Here's the gems environment:</p>
  
  <blockquote>
    <p>RubyGems Environment:<br>
    &nbsp;&nbsp;- RUBYGEMS VERSION: 1.1.1<br>
    &nbsp;&nbsp;- RUBY VERSION: 1.8.6 (2008-08-11 patchlevel 287) [universal-darwin9.0]<br>
    &nbsp;&nbsp;- INSTALLATION DIRECTORY: /Library/Ruby/Gems/1.8<br>
    &nbsp;- RUBY EXECUTABLE: /System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/bin/ruby<br>
    &nbsp;&nbsp;- RUBYGEMS PLATFORMS:<br>
    &nbsp;&nbsp;&nbsp;&nbsp;- ruby<br>
    &nbsp;&nbsp;&nbsp;&nbsp;- universal-darwin-9<br>
    &nbsp;&nbsp;- GEM PATHS:<br>
    &nbsp;&nbsp;&nbsp;&nbsp;- /Library/Ruby/Gems/1.8<br>
    &nbsp;&nbsp;&nbsp;&nbsp;- /System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/lib/ruby/gems/1.8<br>
    &nbsp;&nbsp;- GEM CONFIGURATION:<br>
    &nbsp;&nbsp;&nbsp;&nbsp;- :update_sources => true<br>
    &nbsp;&nbsp;&nbsp;&nbsp;- :verbose => true<br>
    &nbsp;&nbsp;&nbsp;&nbsp;- :benchmark => false<br>
    &nbsp;&nbsp;&nbsp;&nbsp;- :backtrace => false<br>
    &nbsp;&nbsp;&nbsp;&nbsp;- :bulk_threshold => 1000<br>
    &nbsp;&nbsp;- REMOTE SOURCES:<br>
    &nbsp;&nbsp;&nbsp;&nbsp;- <a href="http://gems.rubyforge.org" rel="noreferrer">http://gems.rubyforge.org</a><br></p>
  </blockquote>
  
  <p>So, yeah, any ideas?</p>