Fix typo in Makefile
Fix typo in Makefile

nitrogen/nitrogen,kevinmontuori/nitrogen,joaohf/nitrogen,nitrogen/nitrogen,stuart-thackray/nitrogen,stuart-thackray/nitrogen,kevinmontuori/nitrogen,choptastic/nitrogen,stuart-thackray/nitrogen,nitrogen/nitrogen,joaohf/nitrogen,choptastic/nitrogen,choptastic/nitrogen,kevinmontuori/nitrogen,joaohf/nitrogen