diff --git a/Runtimes/Overlay/Android/clang/CMakeLists.txt b/Runtimes/Overlay/Android/clang/CMakeLists.txt
index 2ca7b561b1f0c..378aefa2e641d 100644
--- a/Runtimes/Overlay/Android/clang/CMakeLists.txt
+++ b/Runtimes/Overlay/Android/clang/CMakeLists.txt
@@ -6,7 +6,7 @@ file(CONFIGURE
 ---
 version: 0
 case-sensitive: false
-use-external-names: false
+use-external-names: true
 roots:
   - name: "@CMAKE_ANDROID_NDK@/toolchains/llvm/prebuilt/windows-x86_64/sysroot/usr/include"
     type: directory
diff --git a/Runtimes/Overlay/Linux/glibc/clang/CMakeLists.txt b/Runtimes/Overlay/Linux/glibc/clang/CMakeLists.txt
index f2cee0fdb8da8..64fccfa49b3aa 100644
--- a/Runtimes/Overlay/Linux/glibc/clang/CMakeLists.txt
+++ b/Runtimes/Overlay/Linux/glibc/clang/CMakeLists.txt
@@ -8,7 +8,7 @@ file(CONFIGURE
 ---
 version: 0
 case-sensitive: false
-use-external-names: false
+use-external-names: true
 roots:
   - name: "/usr/include"
     type: directory
diff --git a/Runtimes/Overlay/Windows/clang/CMakeLists.txt b/Runtimes/Overlay/Windows/clang/CMakeLists.txt
index 1d88b8ed024ad..1994da8bc38bb 100644
--- a/Runtimes/Overlay/Windows/clang/CMakeLists.txt
+++ b/Runtimes/Overlay/Windows/clang/CMakeLists.txt
@@ -11,7 +11,7 @@ file(CONFIGURE
 ---
 version: 0
 case-sensitive: false
-use-external-names: false
+use-external-names: true
 roots:
   - name: "@WindowsSdkDir@/Include/@WindowsSDKVersion@/um"
     type: directory