diff --git a/setup.py b/setup.py
index 3fc7fc7..6a1aaec 100755
--- a/setup.py
+++ b/setup.py
@@ -610,7 +610,7 @@ def get_pylon_version(self):
         if lst:
             dll_path = lst[0]
         else:
-            raise EnvironmentError("could not find PylonBase")
+            raise EnvironmentError(f"could not find PylonBase in ->{dll_dir}<-")
 
         # temporarily add dll dir to path
         prev_path = os.environ['PATH']