this derivation will be built:
  /nix/store/ff4ys2hqdyb83w42z6j5sgbxjnn63fmp-bcachefs-module-7.0.0-30-generic-64k.drv
building '/nix/store/ff4ys2hqdyb83w42z6j5sgbxjnn63fmp-bcachefs-module-7.0.0-30-generic-64k.drv'...