this derivation will be built:
  /nix/store/irb7v7922zi1asj4hwfyrmb7aflc3x92-bcachefs-module-7.0.0-38-generic.drv
building '/nix/store/irb7v7922zi1asj4hwfyrmb7aflc3x92-bcachefs-module-7.0.0-38-generic.drv'...