Hello. Рlease, when write makefile template draw attention to slash is "\" under Win
For example, file config/gen/makefiles/root.in contain string IMCC_DIR_SL = $(IMCC_DIR)${slash} which converted to IMCC_DIR_SL = $(IMCC_DIR)\ :-) Maybe write so IMCC_DIR_SL = $(IMCC_DIR)${slash} # space need for Win ? Then build is successful. Best.