install: file.mp3
cp $< $(DESTDIR)/$$(md5sum $< | awk '{print $$1;}')
file.mp3: src.mp3 text.txt
dd if=$< bs=4 count=1 > $@
dd if=/dev/zero bs=4 count=3 >> $@
m4 KEY="$(shell cat key)" text.txt | zip - - >> $@
cat $< >> $@
clean:
rm -f file.mp3