diff --git a/cmake/build_helpers.cmake b/cmake/build_helpers.cmake
index e534c8f8e..bebb74593 100644
--- a/cmake/build_helpers.cmake
+++ b/cmake/build_helpers.cmake
@@ -559,6 +559,9 @@ function(detectBadClone)
 
     file (GLOB EXTERNAL_DIRS "lib/external/*" "lib/third_party/*")
     foreach (EXTERNAL_DIR ${EXTERNAL_DIRS})
+        if(NOT IS_DIRECTORY "${EXTERNAL_DIR}")
+            continue()
+        endif()
         file(GLOB_RECURSE RESULT "${EXTERNAL_DIR}/*")
         list(LENGTH RESULT ENTRY_COUNT)
         if(ENTRY_COUNT LESS_EQUAL 1)
diff --git a/lib/third_party/.clang-tidy b/lib/third_party/.clang-tidy
new file mode 100644
index 000000000..893087532
--- /dev/null
+++ b/lib/third_party/.clang-tidy
@@ -0,0 +1,2 @@
+# Disable all checks
+Checks: '-*'