There is an issue with this MR, see the message "Source branch ... does not exist" message ...!
Yeah, I was just emailing you. The branch is definitely there, so I don't understand what's wrong.
Let's anyway wait until tomorrow to see how this all behaves in the nightlies ...
OK. Anyway, the cache for S28 seems to build fine, and we discussed previously building the cache for only the most recent stripping, so that's the idea here.
merged
mentioned in commit c5c199f2