Containers -- how to synchronize development and lagging repo

Hi GHC HQ, with the new library submission process, I think we should have development repo for containers (maybe on github?). Is there any standard way of dealing with lagging repos? I am not sure if updating the lagging repo and releasing cabal packages is responsibility of GHC HQ of the maintainers. With the new library process, there will probably be more people affected by this issue. BTW, we can also do the development on different branch of the repo, or the lagging repo can be a different branch. But it sounds a bit tricky... Cheers, Milan