Caching yarn global packages in pipelines

[Steve Vaughan]

Is is possible to configure a cache that will work for packages installed with `yarn global`?

I have tried the following, however the packages were not found when run after cache download:

image: node:9
pipelines:
  default:
    # Lint
    - step:
        name: Linting
        caches:
          - yarnglobal
        script:
          - yarn global add eslint eslint-plugin-react babel-eslint
          - yarn lint
definitions:
  caches:
      yarnglobal: /usr/local/share/.config/yarn/global