Index: test/xray/CMakeLists.txt
===================================================================
--- test/xray/CMakeLists.txt
+++ test/xray/CMakeLists.txt
@@ -28,11 +28,13 @@
 
   # Add unit tests.
   if(COMPILER_RT_INCLUDE_TESTS)
-    configure_lit_site_cfg(
-      ${CMAKE_CURRENT_SOURCE_DIR}/Unit/lit.site.cfg.in
-      ${CMAKE_CURRENT_BINARY_DIR}/Unit/lit.site.cfg)
-    list(APPEND XRAY_TEST_DEPS XRayUnitTests)
-    list(APPEND XRAY_TESTSUITES ${CMAKE_CURRENT_BINARY_DIR}/Unit)
+    if(UNIX AND NOT APPLE)
+      configure_lit_site_cfg(
+        ${CMAKE_CURRENT_SOURCE_DIR}/Unit/lit.site.cfg.in
+        ${CMAKE_CURRENT_BINARY_DIR}/Unit/lit.site.cfg)
+      list(APPEND XRAY_TEST_DEPS XRayUnitTests)
+      list(APPEND XRAY_TESTSUITES ${CMAKE_CURRENT_BINARY_DIR}/Unit)
+    endif()
   endif()
 endif()