unixODBC >= 2.2.11 (http://www.unixodbc.org/) unixodbc-dev FreeTDS >= 0.63 (http://www.freetds.org/) freetds-dev Note that you need to install unixODBC before FreeTDS: The ./configure step of FreeTDS is dependent on unixODBC being installed: ./configure —with-unixodbc=/usr/local Ruby ODBC binding (http://www.ch-werner.de/rubyodbc/ruby-odbc-0.9997.tar.gz). Extract and in the extracted folder run: