nix path-info: Show download sizes for binary cache stores

E.g.

  $ nix path-info --json --store https://cache.nixos.org nixpkgs.thunderbird -S
  ...
      "downloadHash": "sha256:1jlixpzi225wwa0f4xdrwrqgi47ip1qpj9p06fyxxg07sfmyi4q0",
      "downloadSize": 43047620,
      "closureDownloadSize": 84745960
    }
  ]

1 files changed, 1 insertions, 1 deletions

diff --git a/src/nix/path-info.cc b/src/nix/path-info.cc
index f7610ab0814d..ca02a4c929be 100644
--- a/src/nix/path-info.cc
+++ b/src/nix/path-info.cc
@@ -84,7 +84,7 @@ struct CmdPathInfo : StorePathsCommand, MixJSON
                     std::cout << '\t' << std::setw(11) << info->narSize;
 
                 if (showClosureSize)
-                    std::cout << '\t' << std::setw(11) << store->getClosureSize(storePath);
+                    std::cout << '\t' << std::setw(11) << store->getClosureSize(storePath).first;
 
                 if (showSigs) {
                     std::cout << '\t';