That is, determinism.
When someone claims to have free will, I tranlate it into English: "My outputs are not functions of my inputs."
Very well. What are your outputs functions of? Cosmic rays?
A random robot is still a robot, and Heisenberg offers no shelter.
If the universe is causal then it is deterministic.
If the universe is random then it has no room for free will.
(And yes, I am "reading" Wegner's book, and I find it difficult, tendentious, and boring.)
Personally I wish it were otherwise but there you have it.