perf: try running things in parallel in codespaces install
perf: try running things in parallel in codespaces install

Let's see if this makes it faster.

No need to worry about `sudo` prompts here, because we have passwordless
sudo.

wincent/wincent,wincent/wincent,wincent/wincent,wincent/wincent,wincent/wincent,wincent/wincent,wincent/wincent,wincent/wincent