title: Installing herouku on ubuntu 10.10
body: <p>I am getting the following error while trying to install heroku.</p>
  
  <pre><code>arun@laptop:~/apps/pm$ sudo gem install heroku
  Building native extensions.  This could take a while...
  ERROR:  Error installing heroku:
      ERROR: Failed to build gem native extension.
  
  /usr/bin/ruby1.8 extconf.rb
  extconf.rb:1:in `require': no such file to load -- mkmf (LoadError)
      from extconf.rb:1
  
  
  Gem files will remain installed in /var/lib/gems/1.8/gems/json-1.4.6 for inspection.
  Results logged to /var/lib/gems/1.8/gems/json-1.4.6/ext/json/ext/generator/gem_make.out
  arun@laptop:~/apps/pm$ 
  </code></pre>