https://dnceng.visualstudio.com/internal/_build/results?buildId=2375891&view=results as an example build This started happening after Wednesday 9AM (GMT+1) as at that time the full build was still green: https://dnceng.visualstudio.com/internal/_build/results?buildId=2372357&view=results I looked at all the commits since then and likely the change that regressed this is https://github.com/directhex/installer/blob/64e1ffe1baac9592f27a16636f01064ddc60a2bd/src/SourceBuild/patches/runtime/0002-short-stack-support.patch#L41 @directhex PTAL