setup_var on EFI Shell

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Hello. I'm trying to change some hidden UEFI values with a EFI shell, but the Shell I'm using - edk2 Full shell - doesn't support the command I need (setup_var 0x01 0x40), can someone point me towards a shell that can do that?
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It looks like there is a thread active about this subject on another forum: ... ll?page=17

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