this derivation will be built:
  /nix/store/70qqwqv2vmmc70n0jygwgfirpys1nbq5-bcachefs-module-7.0.0-39-generic.drv
building '/nix/store/70qqwqv2vmmc70n0jygwgfirpys1nbq5-bcachefs-module-7.0.0-39-generic.drv'...