this derivation will be built:
  /nix/store/81fmpr2hdqmzl171b37kwrgmdmr9sl3n-bcachefs-module-7.0.0-30-generic.drv
building '/nix/store/81fmpr2hdqmzl171b37kwrgmdmr9sl3n-bcachefs-module-7.0.0-30-generic.drv'...