diff --git a/src/yunohost/data_migrations/0021_migrate_to_bullseye.py b/src/yunohost/data_migrations/0021_migrate_to_bullseye.py
index cb8a333f5..162b8e376 100644
--- a/src/yunohost/data_migrations/0021_migrate_to_bullseye.py
+++ b/src/yunohost/data_migrations/0021_migrate_to_bullseye.py
@@ -39,8 +39,11 @@ def _get_all_venvs(dir, level=0, maxlevel=3):
         maxlevel - the depth of the recursion
         level - do not edit this, used as an iterator
     """
-    # Using os functions instead of glob, because glob doesn't support hidden folders, and we need recursion with a fixed depth
+    if not os.path.exists(dir):
+        return []
+
     result = []
+    # Using os functions instead of glob, because glob doesn't support hidden folders, and we need recursion with a fixed depth
     for file in os.listdir(dir):
         path = os.path.join(dir, file)
         if os.path.isdir(path):