ls012 = $(realpath ls012)
-$(ls012)/areas.mdwn $(ls012)/xo_cost.mdwn: ls012_optable.py ls012/optable.csv
+$(ls012)/areas.mdwn $(ls012)/xo_cost.mdwn \
+$(ls012)/level.mdwn: ls012_optable.py ls012/optable.csv
@echo making optables
python3 ls012_optable.py