this derivation will be built:
  /nix/store/39bdayc9wj4p3vlhz5z4hk47xc7p1d9a-bcachefs-module-7.0.0-31-generic.drv
building '/nix/store/39bdayc9wj4p3vlhz5z4hk47xc7p1d9a-bcachefs-module-7.0.0-31-generic.drv'...