this derivation will be built:
  /nix/store/is1xmpaz0cm5cx2n5ff1mih6fay78qwb-bcachefs-module-7.0.0-27-generic.drv
building '/nix/store/is1xmpaz0cm5cx2n5ff1mih6fay78qwb-bcachefs-module-7.0.0-27-generic.drv'...