Seen in #1059 (comment)
That looks like a build issue. @ViktorHofer@dagood I thought the live-live build was working now? That looks like it's referencing packages from yesterday?
#839 documents that you need to do a fresh build whenever you cross a day boundary. Looks like it applies to CI as well.
I believe this is a combination of:
It looks like the original error was also caused by UTC day tickover. Here's the timestamp on the first line of a failing Installer build step in attempt 1:
2019-12-20T00:03:04.6739571Z
Core-Setup stopped having this problem once it moved off BuildTools onto Arcade. Now we've got it again because of global dotnet/runtime settings.
Right now, any build where Libraries => Installer spans a UTC day should fail this way.
Seen in #1059 (comment)