This has changed in version 0.3. Now you will need:
Download the tarball
or, if your running Gentoo Linux, the ebuild.
In case of the tarball, simply extract somewhere and run "ccmake ." in that directory. Choose what kind of build you want, probably "Release". When makefiles are genereated, run "make && make install".
In case of the ebuild, extract the tarball in your portage overlay directory and run "emerge boombox".