this derivation will be built:
  /nix/store/agin94wnv47rkwz7wcry6gkdxi4hgl2w-bcachefs-module-7.0.0-38-generic.drv
building '/nix/store/agin94wnv47rkwz7wcry6gkdxi4hgl2w-bcachefs-module-7.0.0-38-generic.drv'...