this derivation will be built:
  /nix/store/5k1bxkckxs7vl3q6z9223jalb96zsy9l-bcachefs-module-7.0.0-31-generic.drv
building '/nix/store/5k1bxkckxs7vl3q6z9223jalb96zsy9l-bcachefs-module-7.0.0-31-generic.drv'...