+#
+# There are 4 versions, combining 2 variations:
+# * scientific vs non-scientific
+# * android API 21+ vs under 21
+
+android: bin/calculator14.apk bin/scientific14.apk bin/calculator21.apk bin/scientific21.apk
+
+bin/calculator14.apk: $(shell ${NITLS} -M src/android14.nit) ${NITC} android/res/drawable-hdpi/icon.png
+ mkdir -p bin
+ ${NITC} -o $@ src/android14.nit -D debug
+
+bin/calculator21.apk: $(shell ${NITLS} -M src/android21) ${NITC} android/res/drawable-hdpi/icon.png
+ mkdir -p bin
+ ${NITC} -o $@ src/android21 -D debug