We want to remove hostnames from the lockfiles:

wrappy@1:
  version "1.0.2"
  resolved "https://registry.yarnpkg.com/wrappy/-/wrappy-1.0.2.tgz#b5243d8f3ec1aa35f1364605bc0d1036e30ab69f"

Would become:

wrappy@1:
  version "1.0.2"
  resolved "/wrappy/-/wrappy-1.0.2.tgz#b5243d8f3ec1aa35f1364605bc0d1036e30ab69f"

This will allow us to switch the default registry more easily if we need to (for example if we want to deprecate our mirror, or if npm suddenly disappear from the surface of the earth), and will also make it easier for the users to switch from a registry to another.