this derivation will be built:
  /nix/store/3z692vsslf5xk082viykp7b3qqqyly3n-nixos-anywhere-docs.drv
this path will be fetched (4.4 MiB download, 12.9 MiB unpacked):
  /nix/store/5w3bwmbl9k9n397l6ar2k7v8zngsqakp-mdbook-0.5.4