this derivation will be built:
  /nix/store/s85kcpjx4hd052i2b7f4kwjy9c702jka-bcachefs-module-7.0.0-38-generic.drv
building '/nix/store/s85kcpjx4hd052i2b7f4kwjy9c702jka-bcachefs-module-7.0.0-38-generic.drv'...