this derivation will be built:
  /nix/store/9hkq4kdgz70g5j9xv5n65aprvrwawqa5-bcachefs-module-7.0.0-39-generic.drv
building '/nix/store/9hkq4kdgz70g5j9xv5n65aprvrwawqa5-bcachefs-module-7.0.0-39-generic.drv'...