these 2 derivations will be built:
  /nix/store/pq3rzrx4bihc43mx0n4hdpwm0wjc8ryr-flake-inputs.drv
  /nix/store/9kl7skjgd2csnl1g3jw0jbvfk9yd2wd1-check-flake-inputs.drv