A link to the source should be available somewhere in the source install instructions for Ubuntu/Debian.

I started with [Building a Dev Environment Doc](http://docs.basho.com/riak/latest/tutorials/fast-track/Building-a-Development-Environment/) page and then click on the "install from source" and choose the [Debian/Ubuntu](http://docs.basho.com/riak/latest/tutorials/installation/Installing-on-Debian-and-Ubuntu/) link. At this point I would assume there would be a link to the actual source, but I don't see it anywhere. It should go to either the non-OS specific [Installing from Source](http://docs.basho.com/riak/latest/tutorials/installation/Installing-Riak-from-Source/#Installation) or have instructions for the link & information to get the source and build it.