this derivation will be built:
  /nix/store/a156dj4ld77f5ci3l9hlrg9f65ikjjz2-nix-shell.drv
these 2 paths will be fetched (218.0 KiB download, 1.0 MiB unpacked):
  /nix/store/4r26s03r139i427w2ssf61vywpjmfxxz-nix-update-1.16.0
  /nix/store/lqm5zr3iwsqwl6lh4cixdif5306y8cy8-nixpkgs-review-4.0.0