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Compass install error in Linux Mint.

I am having the hardest time getting compass to run on any computer. I kept getting errors in windows that I could not figure out, so I installed Linux Mint as a dual boot (I really like it). Now i get the following error when I try to install it in Mint. It installed Sass, so some parts are working properly.

ted@ted-Lenovo-G770 ~ $ sudo gem install compass [sudo] password for ted: Building native extensions. This could take a while... ERROR: Error installing compass: 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:inrequire' from extconf.rb:4:in `<main>'

Gem files will remain installed in /var/lib/gems/1.9.1/gems/ffi-1.9.8 for inspection. Results logged to /var/lib/gems/1.9.1/gems/ffi-1.9.8/ext/ffi_c/gem_make.out ted@ted-Lenovo-G770 ~ $

I could really use some help getting this solved.