This code is made to run on an atmega328p using the library avr-i2c-slave (https://github.com/thegouger/avr-i2c-slave.git)

I included my avrdude.conf for easy building.

On Debian you need:
avrdude 
gcc-avr
Probably a lot other stuff I forgot.

Make sure you have the correct fuses, the correct name for you AVR and then run:
make
sudo make program