this derivation will be built:
  /nix/store/68pg1sdh790ylp4bqakdxaf6n9p9r70g-nix-shell.drv
these 2 paths will be fetched (218.0 KiB download, 1.0 MiB unpacked):
  /nix/store/d2q0l7zsff7misagg669d9gc5mjkjim8-nix-update-1.16.0
  /nix/store/i4f3asl76sdl3vyj6sxrn454bwdmbjsa-nixpkgs-review-4.0.0