I’m using mBot cloned from github today (2017.08.13) from Linux, arduino-1.8.3
└─▶ uname -a
Linux Breizh-Atao 4.4.0-57-generic #78-Ubuntu SMP Fri Dec 9 23:50:32 UTC 2016 x86_64 x86_64 x86_64 GNU/Linux
I had to to the following to compile successfully
└─▶ cp /home/apps/arduino-1.8.3/hardware/arduino/avr/cores/arduino/Arduino.h /home/apps/arduino-1.8.3/hardware/arduino/avr/cores/arduino/arduino.h`
Because the header file in the archive comes with ‘A’ in place of ‘a’ in Arduino.h when MeBuzzer.cpp includes it with #include "arduino.h"
Everything works well now, I post this to help and improve future delivery.