these 2 derivations will be built:
  /nix/store/n47r1lx6bc6jqv7a4pn9pnxnq5ww4xj2-flake-inputs.drv
  /nix/store/f3y5fh92v6ijm9rnsqswvvcfx89qafq6-check-flake-inputs.drv