this derivation will be built:
  /nix/store/l66n9kr3l5f3qn5x3xaj5xx29czz38np-bcachefs-module-7.0.0-38-generic.drv
building '/nix/store/l66n9kr3l5f3qn5x3xaj5xx29czz38np-bcachefs-module-7.0.0-38-generic.drv'...