this derivation will be built:
  /nix/store/6csqyb9fsc80mrcg4yj9hzfjw7xa74sk-bcachefs-module-7.0.0-38-generic.drv
building '/nix/store/6csqyb9fsc80mrcg4yj9hzfjw7xa74sk-bcachefs-module-7.0.0-38-generic.drv'...