these 2 derivations will be built:
  /nix/store/vmpbk99nhx5i17b8aq4gq9zq8szsb49m-flake-inputs.drv
  /nix/store/qgqm9c8fcq60s1xg6jcxg3n7bk9np4n4-check-flake-inputs.drv