diff --git a/tools/pywasmcross b/tools/pywasmcross
index a888272a7..3da054c39 100755
--- a/tools/pywasmcross
+++ b/tools/pywasmcross
@@ -104,6 +104,8 @@ def handle_command(line, args):
     for arg in line:
         if r'/file.c' in arg or '_configtest' in arg:
             return
+        if re.match('/tmp/.*/source\.[bco]+', arg):
+            return
         if arg == '-print-multiarch':
             return