diff --git a/CMakeLists.txt b/CMakeLists.txt
index 4476bbe894498..15413c8e30cea 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -941,7 +941,8 @@ if (LLVM_ENABLE_DOXYGEN)
   message(STATUS "Doxygen: enabled")
 endif()
 
-if(SWIFT_BUILD_SYNTAXPARSERLIB OR SWIFT_BUILD_SOURCEKIT)
+if((SWIFT_BUILD_SYNTAXPARSERLIB OR SWIFT_BUILD_SOURCEKIT) AND
+    ${SWIFT_HOST_VARIANT_SDK} MATCHES "OSX|WINDOWS")
   if(NOT CMAKE_SYSTEM_NAME STREQUAL Darwin)
     if(CMAKE_C_COMPILER_ID STREQUAL Clang AND
        CMAKE_C_COMPILER_VERSION VERSION_GREATER 3.8