this derivation will be built:
  /nix/store/6jxalpxgr6pgp0jc3jcwrxspfrkngdyw-nixos-anywhere-docs.drv
this path will be fetched (4.8 MiB download, 15.2 MiB unpacked):
  /nix/store/ljsl00rshrbnfdjgsi2p86g26a4dl8vn-mdbook-0.5.4