When constructing a Windows MSI or EXE bundle containing an app that you configure as a Service (by setting SERVICE_HINT = true) then if the value of SYSTEM_WIDE is false we've a problem because a Service is generally something you wan't system wide. Probably SYSTEN_WIDE = false might be rejected.

By the way with current implementation (FX 8 U20 b21) the method execute() called for an MSI as a Service && SYSTEM_WIDE = false returns null (but the bundle is well written on disk).