diff --git a/ci_scripts/ci_pre_xcodebuild.sh b/ci_scripts/ci_pre_xcodebuild.sh
new file mode 100755
index 0000000000..054a396394
--- /dev/null
+++ b/ci_scripts/ci_pre_xcodebuild.sh
@@ -0,0 +1,8 @@
+#!/bin/sh
+
+set -eux
+
+if [ "${CI_WORKFLOW-}" = "Nightly (Xcode 26)" ]; then
+    : "Downloading Metal Toolchain for Xcode 26"
+    xcodebuild -downloadComponent MetalToolchain
+fi