how to resolve 'yarn package has unmet peer dependency'

Question

I get a load of warnings when I run yarn upgrade or install because of unmet peerDependencies.

warning " > [email protected]" has unmet peer dependency "graphql@^0.11.0 || ^0.12.0 || ^0.13.0 || ^14.0.0".
warning " > [email protected]" has unmet peer dependency "@babel/core@^7.0.0".

As I understand it, the listed packages need the dependency, and another package in my project has the dependency, I can find the deps but I can't find any information about how to direct the said packages to the sub dependency that I know exists.

How can I get yarn to quiet down and show it where these deps are?

Solution

Both warnings are about peer dependencies, which means that it's your application's responsibility to provide those packages as dependencies.

In this case graphql and @babel/core are expected to be installed in your root app.