these 3 derivations will be built:
  /nix/store/gp89rjg2hxa34cdmhj1yx80fnhp0qzbd-pi-src-with-lock.drv
  /nix/store/b823sq6gq0133ks01qrblacd0lyfpvrx-pi-1.4.0.drv
  /nix/store/3g6m4bv8ma8na2dx1vhwdkkh6s9254hi-check-pi.drv