these 2 derivations will be built:
  /nix/store/0k6bvfqm2qh1cx0l3rb1in3rg6f3bqmy-flake-inputs.drv
  /nix/store/0s90m7xffdwbzs5gbq0ria9aj8hj9g0k-check-flake-inputs.drv