Swift Package Plugin - Copy Build Artifact

Is it possible to create a build tool plugin that runs after the build and copies build artifacts to another location in the package directory?

For example, say I have an executable target named tool. Each time that I build tool, I'd like to copy the build artifact from .build/release/tool to ./tool so that it's available at the root of the package.

As far as I can tell, this can't be done. But I may be missing something.