Factor is a practical dynamic stack language. Parrot is a Virtual Machine designed to run dynamic languages.
You will need to have the Parrot Virtual Machine installed to compile Kea. You can download it at http://parrot.org . You will need at least version 1.8.0 or higher.
$ parrot setup.pir build
$ parrot setup.pir test
$ parrot setup.pir clean
$ sudo parrot setup.pir install
$ sudo parrot setup.pir uninstall