When installing packages with Yarn, what does “incorrect peer dependency” mean?

Question

I\'ve just cloned a repo, which recommends the use of Yarn to install dependencies. When I run yarn install, it seems to be okay, but it provides this warning:<

Answer 1

It is only a warning as it won't actually stop your code from running, It's just there to give you a heads up that there's something wrong with your dependencies.

Effectively, peer dependencies are a way for packages to specify, "to use me, you should also have x version of y package installed".

You should upgrade to the latest versions, see this link for more details on sass-loader dependencies