I'm trying to compile for a CPX Bluefruit with Platform IO. Here is my platformio.ini file entry:

[env:cplay52]
platform = https://github.com/h2zero/platform-n-able.git#1.0.0
board = adafruit_cplaynrf52840
build_flags = -D CONFIG_WDT_TIMEOUT_SECONDS=0
lib_deps = h2zero/NimBLE-Arduino@^1.4.0

When I try to build I get an error:

Error. Board type requires board_bootloader to be specified

Same problem with the Adafruit Clue.

Thank you!