Generally speaking, the installer scripts dont try to create deep folder structures in staging root, the idea is that staging root should already be populated with a skeleton directory structure (staging root is designed for linux package builders, and that assumption typically holds true in that context).
Otherwise one then has to deal with failures to create the directories. Do we warn/abort/ignore? The appropriate action depends on the context.
Still I dont have particularly strong feelings on this issue, so I wont refuse a patch.
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