See if this passes Travis CI

platformio.ini

 #
 [env:LPC1768]
 platform        = nxplpc
+board           = lpc1768
 board_f_cpu     = 100000000L
 build_flags     = !python Marlin/src/HAL/HAL_LPC1768/lpc1768_flag_script.py
   ${common.build_flags}