diff --git a/lldb/packages/Python/lldbsuite/test/make/Makefile.rules b/lldb/packages/Python/lldbsuite/test/make/Makefile.rules
index f7f6e48f71e5..6c197a2317bf 100644
--- a/lldb/packages/Python/lldbsuite/test/make/Makefile.rules
+++ b/lldb/packages/Python/lldbsuite/test/make/Makefile.rules
@@ -441,18 +441,25 @@ ifeq (1, $(USE_SYSTEM_STDLIB))
 endif
 
 ifeq (,$(filter 1, $(USE_LIBSTDCPP) $(USE_LIBCPP) $(USE_SYSTEM_STDLIB)))
-  # If no explicit C++ library request was made, but we have paths to a custom libcxx, use
-  # them.  Otherwise, use the system library by default.
-  ifneq ($(and $(LIBCPP_INCLUDE_DIR), $(LIBCPP_LIBRARY_DIR)),)
-    CXXFLAGS += -nostdlib++ -nostdinc++ -cxx-isystem $(LIBCPP_INCLUDE_DIR)
-    ifneq "$(LIBCPP_INCLUDE_TARGET_DIR)" ""
-      CXXFLAGS += -cxx-isystem $(LIBCPP_INCLUDE_TARGET_DIR)
-    endif
-
-	# If `-nostdlib++` is not passed, clang will link to the system's stdlib.
-    LDFLAGS += -nostdlib++ -L$(LIBCPP_LIBRARY_DIR) -Wl,-rpath,$(LIBCPP_LIBRARY_DIR) -lc++
-  else
+  ifeq "$(OS)" "Darwin"
+    # If no explicit C++ library request was made, default to the system
+    # libc++. Testing a custom libc++ correctly on apple platforms is difficult
+    # and the apppropriate use cases are limited.
     USE_SYSTEM_STDLIB := 1
+  else
+    # If no explicit C++ library request was made, but we have paths to a custom libcxx, use
+    # them.  Otherwise, use the system library by default.
+    ifneq ($(and $(LIBCPP_INCLUDE_DIR), $(LIBCPP_LIBRARY_DIR)),)
+      CXXFLAGS += -nostdlib++ -nostdinc++ -cxx-isystem $(LIBCPP_INCLUDE_DIR)
+      ifneq "$(LIBCPP_INCLUDE_TARGET_DIR)" ""
+        CXXFLAGS += -cxx-isystem $(LIBCPP_INCLUDE_TARGET_DIR)
+      endif
+
+    # If `-nostdlib++` is not passed, clang will link to the system's stdlib.
+      LDFLAGS += -nostdlib++ -L$(LIBCPP_LIBRARY_DIR) -Wl,-rpath,$(LIBCPP_LIBRARY_DIR) -lc++
+    else
+      USE_SYSTEM_STDLIB := 1
+    endif
   endif
 endif