this derivation will be built:
  /nix/store/8gxp15b1ibjmmv7nilkkaqbc506a0hqh-bcachefs-module-7.0.0-31-generic.drv
building '/nix/store/8gxp15b1ibjmmv7nilkkaqbc506a0hqh-bcachefs-module-7.0.0-31-generic.drv'...