Multiuser Homebrew privileges

I have two users on my Mac. Both are me, but one is work mode, the other is non-work mode. I have an ongoing issue with installing via homebrew. $ brew install x Error: Can't create update lock in /usr/local/var/homebrew/locks! Fix permissions by running: sudo chown -R $(whoami) /usr/local/var/homebrew Of course, executing this suggested code solves the problem -- until I need to brew install using my other user, then I need to change ownership again. How can I set the permissions so that both users can install with homebrew?