This is whats so powerful and wonderful about it, your end result isn't simply based on the direct dependents, but also includes the build chain for all things.
That's just not that common in other build tools.
That's just not that common in other build tools.
There's benefits, too, though - you know the C compilers, build flags, versions and libraries of everything that goes into making a Python library run. It's easy to change any of it, integrate with your own custom libraries or other languages and test the whole contraption in its entirety.