diff --git a/tox.ini b/tox.ini
index b8c2858c..7bad46dd 100644
--- a/tox.ini
+++ b/tox.ini
@@ -24,6 +24,7 @@ isolated_build = true
 
 [testenv]
 package = wheel
+wheel_build_env = .pkg
 deps =
   django42: Django>=4.2,<4.3
   django50: Django>=5.0,<5.1