this derivation will be built:
  /nix/store/r820av4sdnq6sml18xp4kb5xwa03jfpz-bcachefs-module-7.0.0-30-generic.drv
building '/nix/store/r820av4sdnq6sml18xp4kb5xwa03jfpz-bcachefs-module-7.0.0-30-generic.drv'...