this derivation will be built:
  /nix/store/738a1yfik9n78xjm3zljw4ziqrqpd52p-bcachefs-module-7.0.0-39-generic.drv
building '/nix/store/738a1yfik9n78xjm3zljw4ziqrqpd52p-bcachefs-module-7.0.0-39-generic.drv'...