@mwestphal:
Thank you. Nice to have it as a reference - to see, which build customizations are also available (like e.g. VTK_LEGACY_REMOVE). But I still prefer explicit download. I am not sure, how exactly build caches are handled by different CI systems, but e.g. Travis-CI explicitly tells, that caches should not be used to cache build artifacts. And in GitHub actions I believe artifats are similar to build cache. But I prefer “release artifacts” because for them the retention policies are more obvious and the whole logic is more explicit and thus more clear (at least IMO).