these 2 derivations will be built:
  /nix/store/8pf59qg0cwjiml09jcv9ha4i0nzmwcjr-flake-inputs.drv
  /nix/store/0d2x3sra9yxkqjqmfjqnj9hv4x7vz3k8-check-flake-inputs.drv