libfx2 has the following dependencies:

• GNU make (BSD make is not sufficient) and sdcc for building the firmware code,
• Python 3 and Python libusb1 wrapper for interacting with the device.

On a Debian system, these can be installed with:

apt-get install make sdcc python3 python3-libusb1

Then, compile all firmware components:

make -C firmware

Then, install the Python components to ~/.local:

python3 software/setup.py develop --user

The last step is not required if you just want to upload example firmware.