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:/opt/Kibana-0.2.0# bundle install
Fetching gem metadata from http://rubygems.org/.........
Fetching gem metadata from http://rubygems.org/..
Resolving dependencies...
Using rake (10.0.4)
Using daemons (1.1.9)
Using diff-lcs (1.1.3)
Installing eventmachine (1.0.0)
Gem::Installer::ExtensionBuildError: ERROR: Failed to build gem native extension.

        /usr/bin/ruby1.9.1 extconf.rb
/usr/lib/ruby/1.9.1/rubygems/custom_require.rb:36:in `require': cannot load such file -- mkmf (LoadError)
        from /usr/lib/ruby/1.9.1/rubygems/custom_require.rb:36:in `require'
        from extconf.rb:2:in `<main>'


Gem files will remain installed in /var/lib/gems/1.9.1/gems/eventmachine-1.0.0 for inspection.
Results logged to /var/lib/gems/1.9.1/gems/eventmachine-1.0.0/ext/gem_make.out

An error occurred while installing eventmachine (1.0.0), and Bundler cannot continue.
Make sure that `gem install eventmachine -v '1.0.0'` succeeds before bundling.
root@pb-DocDatabase-01:/opt/Kibana-0.2.0# gem install eventmachine -v '1.0.0'
Building native extensions.  This could take a while...
ERROR:  Error installing eventmachine:
        ERROR: Failed to build gem native extension.

        /usr/bin/ruby1.9.1 extconf.rb
/usr/lib/ruby/1.9.1/rubygems/custom_require.rb:36:in `require': cannot load such file -- mkmf (LoadError)
        from /usr/lib/ruby/1.9.1/rubygems/custom_require.rb:36:in `require'
        from extconf.rb:2:in `<main>'


Gem files will remain installed in /var/lib/gems/1.9.1/gems/eventmachine-1.0.0 for inspection.
Results logged to /var/lib/gems/1.9.1/gems/eventmachine-1.0.0/ext/gem_make.out