diff --git a/pkgs/stdenv/darwin/override-sdk.nix b/pkgs/stdenv/darwin/override-sdk.nix
index d24c118cc668..50ebb814522c 100644
--- a/pkgs/stdenv/darwin/override-sdk.nix
+++ b/pkgs/stdenv/darwin/override-sdk.nix
@@ -66,6 +66,12 @@ let
         original = pkgs.darwin.apple_sdk.Libsystem;
         replacement = sdk.Libsystem;
       }
+      # This is different to `pkgs.darwin.apple_sdk.Libsystem` on `aarch64-darwin`.
+      # Isn’t that neat? I think that’s neat. Don’t do macOS SDKs like this.
+      {
+        original = pkgs.darwin.Libsystem;
+        replacement = sdk.Libsystem;
+      }
       # Make sure darwin.CF is mapped to the correct version for the SDK.
       {
         original = pkgs.darwin.CF;