this derivation will be built:
  /nix/store/0gi9kd52xhkqsg7a3j95j5frj021h76v-bcachefs-module-7.0.0-31-generic.drv
building '/nix/store/0gi9kd52xhkqsg7a3j95j5frj021h76v-bcachefs-module-7.0.0-31-generic.drv'...