Backwards Compatibility for build backends

Author: konstin

peps/pep-0815.rst

@@ -53,8 +53,11 @@ Backwards Compatibility
 
 No build backends and installers that the authors are aware of require any
 changes, as they do not support these files beyond skipping them when
-processing the ``RECORD`` file. For verifying provenance, users should refer
-to :ref:`index hosted attestations <packaging:index-hosted-attestations>`.
+processing the ``RECORD`` file. If any build backends do currently write these
+files, they need to deprecate and eventually remove this feature.
+
+For verifying provenance, users should refer to
+:ref:`index hosted attestations <packaging:index-hosted-attestations>`.
 
 Security Implications
 =====================