diff --git a/pkgs/tools/package-management/nix-index/default.nix b/pkgs/tools/package-management/nix-index/default.nix
index f9ab5c71204b..de1cf8319039 100644
--- a/pkgs/tools/package-management/nix-index/default.nix
+++ b/pkgs/tools/package-management/nix-index/default.nix
@@ -21,7 +21,8 @@ rustPlatform.buildRustPackage rec {
     hash = "sha256-r3Vg9ox953HdUp5Csxd2DYUyBe9u61fmA94PpcAZRqo=";
   };
 
-  cargoHash = "sha256-c1Ivsj9of/cjEKU0lo4I9BfIUQZ3pPf2QF9fAlZTQn0=";
+  useFetchCargoVendor = true;
+  cargoHash = "sha256-BKVxtd+gbCHzpnr5LZmKMUMEEZvsZMT0AdlfrLpMYpc=";
 
   nativeBuildInputs = [ pkg-config ];
   buildInputs = [