Even assuming that the process being described works as advertised, the result is in no way, shape, or form "tamper-proof". At best, it builds software that is

Even assuming that the process being described works as advertised, the result is in no way, shape, or form "tamper-proof". At best, it builds software that is "tamper-evident". A tamper-proof solution would produce software that somehow magically foils all attempts to modify or replace it, which isn't really possible (though some malware is somewhat tamper-resistant in that sense).