diff --git a/sphinx/builders/__init__.py b/sphinx/builders/__init__.py
index 62a369a912..9f70582fca 100644
--- a/sphinx/builders/__init__.py
+++ b/sphinx/builders/__init__.py
@@ -89,10 +89,11 @@ def __init__(self, app: "Sphinx", env: BuildEnvironment = None) -> None:
             self.env: BuildEnvironment = env
             self.env.set_versioning_method(self.versioning_method,
                                            self.versioning_compare)
-        elif env is not Ellipsis:
+        else:
             # ... is passed by SphinxComponentRegistry.create_builder to not show two warnings.
             warnings.warn("The 'env' argument to Builder will be required from Sphinx 7.",
                           RemovedInSphinx70Warning, stacklevel=2)
+            self.env: Optional[BuildEnvironment] = None
         self.events: EventManager = app.events
         self.config: Config = app.config
         self.tags: Tags = app.tags