this derivation will be built:
  /nix/store/mfxjjgf1f4238fm8hrxibkxwrs7dipqa-bcachefs-module-7.0.0-39-generic.drv
building '/nix/store/mfxjjgf1f4238fm8hrxibkxwrs7dipqa-bcachefs-module-7.0.0-39-generic.drv'...