this derivation will be built:
  /nix/store/v6cm8nx3dyfrma9g1xqvac2r7wj5xbcj-nix-update-1.16.0.drv
this path will be fetched (121.5 KiB download, 583.5 KiB unpacked):
  /nix/store/qxchyrwbfavrrb4h55likc7nmpvj3rv7-nixpkgs-review-3.9.0