Further, the example would be even simpler if it used dpatch.make. :-) Quoting the dpatch.make manpage:
include /usr/share/dpatch/dpatch.make build: patch ${MAKE} clean: clean-patched unpatch clean-patched: ${MAKE} clean Charles -- If getting up gets you down -- Use Burma-Shave http://burma-shave.org/jingles/1939/if_getting_up
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