diff --git a/build/hydra.nix b/build/hydra.nix
index fe9ca936c..84878fb5e 100644
--- a/build/hydra.nix
+++ b/build/hydra.nix
@@ -170,10 +170,10 @@ in
     pkgs.runCommand "install-tests"
       {
         againstSelf = testNixVersions pkgs pkgs.nix pkgs.pkgs.nix;
-        againstCurrentUnstable =
+        againstCurrentLatest =
           # FIXME: temporarily disable this on macOS because of #3605.
           if system == "x86_64-linux"
-          then testNixVersions pkgs pkgs.nix pkgs.nixUnstable
+          then testNixVersions pkgs pkgs.nix pkgs.nixVersions.latest
           else null;
         # Disabled because the latest stable version doesn't handle
         # `NIX_DAEMON_SOCKET_PATH` which is required for the tests to work