this derivation will be built:
  /nix/store/172lwnlrnvc398ws10vj4bzmvvjvm25q-bcachefs-module-7.0.0-31-generic.drv
building '/nix/store/172lwnlrnvc398ws10vj4bzmvvjvm25q-bcachefs-module-7.0.0-31-generic.drv'...