diff --git a/iscc_core/check.py b/iscc_core/check.py
index f422d41..f7f5242 100644
--- a/iscc_core/check.py
+++ b/iscc_core/check.py
@@ -1,6 +1,7 @@
 # -*- coding: utf-8 -*-
 """Inspect lib environment/installation"""
 import inspect
+from loguru import logger as log
 
 
 __all__ = ["turbo"]
@@ -14,6 +15,7 @@ def turbo():  # pragma: no cover
     modules = (cdc, minhash, simhash, dct, wtahash)
     for module in modules:
         module_file = inspect.getfile(module)
+        log.debug(f"Module {module.__name__} file: {module_file}")
         if module_file.endswith(".py"):
             return False
     return True