diff --git a/pym/bob/utils.py b/pym/bob/utils.py
index 59dc8bf6..6f8cd028 100644
--- a/pym/bob/utils.py
+++ b/pym/bob/utils.py
@@ -389,6 +389,7 @@ class DirHasher:
         os.fsencode(".git"),
         os.fsencode(".portage-cache"),
         os.fsencode(".svn"),
+        os.fsencode(".bob-download"),
     ])
     IGNORE_FILES = frozenset([
         os.fsencode("BaseDirList.txt"),