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Background: the hash existed for sharing a target directory. That code isn't implemented yet and a per-user build cache might remove the need for it, so let's remove it for now and more carefully weigh adding it back in. Immediate: This reduces the chance of hitting file length issues on Windows. Generally: This is a bit hacky and for an official solution, we should probably try to find a better way. This could become more important as single-file packages are allowed in workspaces.