Can't `brew link` an unlinked keg

I was able to relink the correct version of node by running:

brew cleanup
brew link node
brew uninstall node
brew install node

I was getting:

$ brew link node
Error: No such keg: /usr/local/Cellar/node
$ brew link node@8
Warning: node@8 is keg-only and must be linked with --force

That command helped to get everything working again:

brew link --overwrite --force node@8