diff --git a/build/macosx/xcrun b/build/macosx/xcrun
new file mode 100755
index 000000000000..7642586e3095
--- /dev/null
+++ b/build/macosx/xcrun
@@ -0,0 +1,10 @@
+#!/bin/sh
+
+case "$*" in
+"--show-sdk-path --sdk iphoneos"|"--show-sdk-path -sdk iphoneos")
+    ;;
+*)
+    echo We only expect this to be executed by third_party/rust/cc/src/lib.rs or rustc when targetting iOS >&2
+    exit 1
+esac
+echo $IPHONEOS_SDK_DIR
diff --git a/config/makefiles/rust.mk b/config/makefiles/rust.mk
index 5fdd6d937375..b10594f5cb8f 100644
--- a/config/makefiles/rust.mk
+++ b/config/makefiles/rust.mk
@@ -254,6 +254,9 @@ export COREAUDIO_SDK_PATH=$(MACOS_SDK_DIR)
 endif
 ifdef IPHONEOS_SDK_DIR
 export COREAUDIO_SDK_PATH=$(IPHONEOS_SDK_DIR)
+# export for build/macosx/xcrun
+export IPHONEOS_SDK_DIR
+PATH := $(topsrcdir)/build/macosx:$(PATH)
 endif
 endif