export ARDUINO_HOME=$HOME/dev/arduino/mpide
export ARDUINO_SKETCHBOOK=$ARDUINO_HOME/../sketchbook

export ARDUINO_HOME=$HOME/dev/arduino/mpide
export ARDUINO_SKETCHBOOK=$ARDUINO_HOME/../sketchbook
export ARDUINO_MAKEFILE_HOME=$PROJECTS/arduino.mk

Add path to arduino makefile.
Add path to arduino makefile.
