this derivation will be built:
  /nix/store/3kvnnfy70q0smgr91q39x5xcyymzl7h7-bcachefs-module-7.0.0-39-generic.drv
building '/nix/store/3kvnnfy70q0smgr91q39x5xcyymzl7h7-bcachefs-module-7.0.0-39-generic.drv'...