All I do for builds is:
DFU_UPDATE_BUILD=1 RELEASE=1 BOARD=X make
NRF_SDK11=1 should really be in the board.py (See microbit.py?), and I think you should leave USE_BOOTLADER=1 out - that could be it?
NRF_SDK11=1
USE_BOOTLADER=1
@Gordon started
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All I do for builds is:
NRF_SDK11=1
should really be in the board.py (See microbit.py?), and I think you should leaveUSE_BOOTLADER=1
out - that could be it?