this derivation will be built:
  /nix/store/rd9i9wc431vdswv6z7f46frz12xkdvq6-bcachefs-module-7.0.0-31-generic.drv
building '/nix/store/rd9i9wc431vdswv6z7f46frz12xkdvq6-bcachefs-module-7.0.0-31-generic.drv'...