gem install fluent-plugin-kafka 報錯解決不了阿

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我在用apt-get install 方式安裝了ruby1.9.1 以及rubygems2.4...并且已經(jīng)安裝好了kafka以及td_agent  但是我采用gem install fluent-plugin-kafka時報錯：
root@precise32:/etc/td-agent/plugin/fluent-plugin-kafka# gem install fluent-plugin-kafka
Building native extensions.  This could take a while...
ERROR:  Error installing fluent-plugin-kafka:
        ERROR: Failed to build gem native extension.

    /usr/bin/ruby1.9.1 -r ./siteconf20140811-11065-1j7zal1.rb extconf.rb
/usr/local/lib/site_ruby/1.9.1/rubygems/core_ext/kernel_require.rb:54:in `require': cannot load such file -- mkmf (LoadError)
        from /usr/local/lib/site_ruby/1.9.1/rubygems/core_ext/kernel_require.rb:54:in `require'
        from extconf.rb:1:in `<main>'

extconf failed, exit code 1

Gem files will remain installed in /usr/lib/ruby/gems/1.9.1/gems/msgpack-0.5.8 for inspection.
Results logged to /usr/lib/ruby/gems/1.9.1/extensions/x86-linux/1.9.1/msgpack-0.5.8/gem_make.out
跪求解決方法阿。。。備注：rubygems下載源已經(jīng)切換成了淘寶源了——在線等阿。。。。