* Add the new `TARGET/generated` rule to the `all` target in
`package-build-dockerfiles/Makefile`.
* Write `package-build-dockerfiles/TARGET/Dockerfile`.
-* Add a rule for `TARGET/generated` to `package-test-dockerfiles/Makefile`.
-* Add the new `TARGET/generated` rule to the `all` target in
- `package-test-dockerfiles/Makefile`.
* Write `package-test-dockerfiles/TARGET/Dockerfile`.
* Create `package-testing/test-packages-TARGET.sh`, ideally by making it a
symlink to `FORMAT-common-test-packages.sh`.