Problem installing sqlite3-ruby gem

Never learnt my lessons. Encountered this so many times.

sudo gem install sqlite3-ruby

Building native extensions.  This could take a while...
ERROR:  Error installing sqlite3-ruby:
        ERROR: Failed to build gem native extension.

/usr/bin/ruby1.8 extconf.rb
checking for fdatasync() in -lrt... yes
checking for sqlite3.h... no
*** extconf.rb failed ***
Could not create Makefile due to some reason, probably lack of
necessary libraries and/or headers.  Check the mkmf.log file for more
details.  You may need configuration options.

The solution is to make sure the following library's installed!

sudo apt-get install libsqlite3-dev