title: unable to install nokogiri in ubuntu 12.04
body: <p>I am trying to setup rails env on my new ubuntu machine. But I am facing trouble while install nokogiri gem.. I have installed libxslt and libxml2 libs thourgh rvm pkg command as well as using apt-get. I thought it is showing me libxslt is missing error. </p>
  
  <pre><code>Building native extensions.  This could take a while...
  ERROR:  Error installing nokogiri:
      ERROR: Failed to build gem native extension.
  
          /home/hacker5/.rvm/rubies/ruby-1.9.3-p194/bin/ruby extconf.rb --with-xslt-include=/usr/include/libxslt
  checking for libxml/parser.h... yes
  checking for libxslt/xslt.h... yes
  checking for libexslt/exslt.h... yes
  checking for iconv_open() in iconv.h... no
  checking for iconv_open() in -liconv... yes
  checking for xmlParseDoc() in -lxml2... yes
  checking for xsltParseStylesheetDoc() in -lxslt... no
  -----
  libxslt is missing.  please visit http://nokogiri.org/tutorials/installing_nokogiri.html for help with installing dependencies.
  -----
  </code></pre>
  
  <p><strong>EDIT</strong></p>
  
  <p>I am using rvm setup and ruby 1.9.3</p>