The following directories are not writable by your user: /opt/homebrew/share/zsh /opt/homebrew/share/zsh/site-functions You should change the ownership of these directories to your user. sudo chown -R github-runner /opt/homebrew/share/zsh /opt/homebrew/share/zsh/site-functions And make sure that your user has write permission. chmod u+w /opt/homebrew/share/zsh /opt/homebrew/share/zsh/site-functions