# add reposoitory

deb http://cache.het.net:3142/buildix.thoughtworks.com/repos/debian buildix main

wget http://buildix.thoughtworks.com/repos/debian/buildix-key.gpg
apt-key add buildix-key.gpg
rm buildix-key.gpg

apt-get update
aptitude install buildix

#restart apache to resolve error on normal webserver
/etc/init.d/apache2 restart

#reference: http://buildix.thoughtworks.com/index.php/documentation/package-installation/