graphics := data/ship.png data/icon.png data/life.png data/font.png $(rocks)
INSTALL := install
-INSTALL_PROGRAM := $(INSTALL) -o games -g games
+INSTALL_PROGRAM := $(INSTALL) $(shell sh -c 'test "$$UID" "=" "0" && echo "-o games -g games"')
INSTALL_DATA := $(INSTALL) -m 644