this derivation will be built:
  /nix/store/hv9z089xiwrz560iydypkwdqsxll7008-nix-update-1.16.0.drv
this path will be fetched (121.5 KiB download, 583.5 KiB unpacked):
  /nix/store/f4qzq7ww5jbhhx3qvhv5i7qfvriqaql8-nixpkgs-review-3.9.0