-check-manifest :: MANIFEST
- if test -e .git && git ls-files >\$?.gen 2>&1; then \\
- diff -u \$? \$?.gen; fi
+check_manifest := if test -e .git && git ls-files >MANIFEST.gen 2>&1; then \\
+ diff -u MANIFEST MANIFEST.gen; fi
+
+check-manifest : MANIFEST
+ \$(check_manifest)