nRF52840 - Zephyr - MCUboot and custom board files

I can get certain MCUboot features working for the Lesson 8 test program. However, these features don't work when I try to port them over to a fully fledged project. I think the problem may stem from the board files in my actual project being local, instead of in some global location like in the Lesson 8 DevAcademy test program. 

What do I need to do to make things work? 

thanks

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