this derivation will be built:
  /nix/store/888ji248b6xs6567427ryfb8zl5qqxyn-bcachefs-module-7.0.0-31-generic-64k.drv
building '/nix/store/888ji248b6xs6567427ryfb8zl5qqxyn-bcachefs-module-7.0.0-31-generic-64k.drv'...