James and the Fatdog developers have made a complete compile-from-source build system. They are using Slackware-like package management.
This total approach is superb.
Note, Fatdog forked from Puppy many years ago. At that time, the build system was named Unleashed -- Woof came later, for Puppy.
For Puppy, we now have woof-CE (Community Edition), and for Quirky Linux, of which Easy is the latest incarnation, I have the Quirky build system, a fork of Woof2 (the precursor to woof-CE).