this derivation will be built:
  /nix/store/9ii8jmxqaaxqnmngmcm8l3kw650kqqhq-bcachefs-module-7.0.0-39-generic.drv
building '/nix/store/9ii8jmxqaaxqnmngmcm8l3kw650kqqhq-bcachefs-module-7.0.0-39-generic.drv'...