I want to ensure everything’s re-done, but the system pruning isn’t helping – how do I make sure the cache is clear?

$ docker system prune --all --volumes --force
Total reclaimed space: 0B
$ docker builder prune --all --force
Total:  0B
$ docker build # args...
...
 => CACHED [root 2/4] WORKDIR /root                                                                                                0.0s
 => CACHED [root 3/4] RUN apt-get update && apt-get install --yes     bear     clang     clang-format     clang-tidy     cmake>=3  0.0s
...