Any way to use targetDependencies in nx.json for libraries only?

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Currently there are two ways that I can find in the docs to setup target dependencies. One is in the nx.json which means all applications and libraries that build will build their dependencies. The other is to add dependsOn to every project.json file.

What I need is a way to say that every library in the workspace must build dependencies and every application doesn't require it. If I put dependsOn in the project.json that means for every new library I must add that configuration setting. I'd like to set it globally but could not find any docs on being able to do so. Anyone have any better suggestions?

The reason I need this is our CI process currently has two different builds, one for building the feature branch, and another for the package build. In the case of the feature branch I want all libs and their deps built. In the case of the package build I only want the application built to produce my artifact for deployment. Our builds are upwards of 30 minutes currently (with deps) and only 70 seconds with a single application build.