title: Impossible install of Nokogiri - 'libxml2 is missing'
body: <p>I'm the most horrible of horrible installs of nokogiri.</p>
  
  <p>I've used homebrew to install its libxml2 and libxslt dependencies. I've linked them using brew link. I've unlinked and linked back again. I've got brew 0.8.1.</p>
  
  <p>I've been on the nokogiri installation webpage and passed in the builds and still can't get it to install.</p>
  
  <p>I keep getting</p>
  
  <p><code>
  libxml2 is missing.
  </code></p>
  
  <p>Please help. Would an install on MacPorts be the next plan of attack?</p>