this derivation will be built:
  /nix/store/64wrd6769fimrx3ijh5c677vxpdw6q4a-bcachefs-module-7.0.0-38-generic.drv
building '/nix/store/64wrd6769fimrx3ijh5c677vxpdw6q4a-bcachefs-module-7.0.0-38-generic.drv'...