A workspace places derived data under ~/Library/ by default. We need it to live under build/ for all users. Instead of a legacy-style build products directory, force a workspace-relative DerivedData directory that matches the standard Xcode 4+ layout. Share the workspace settings file that forces the setting. Note that Xcode places its build and index output one level deeper than xcodebuild does.
Also fixed make ipackage-sim by conditionalizing anything related to the .dSYM file, which isn’t generated in the Debug configuration.
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