Basic instructions are here: http://kuffner-sternwarte.at/hms/wiki/index.php5?title=Lightmeter-Driver#Linux

# apt-get install make gcc wget libhid-dev
# wget http://kuffner-sternwarte.at/hms/wiki/uploads/LightmeterLinuxMark2.3.zip
# unzip LightmeterLinuxMark2.3.zip
# make