It seems the ...-sources.jar redundantly contains the native binaries.
For example: lz4-java-1.10.0-sources.jar under the net/jpountz/util/ subdirectories

It looks like the reason for this is how the build-all-and-publish.yml is implemented (and the custom src/resources directory it uses).
Would it be possible to instead just copy the collected native libraries to ${project.build.outputDirectory} (target/classes) like the regular non-release build does it, and remove the special casing for src/resources?