these 2 derivations will be built:
  /nix/store/rbcghw0dqv9r6l4xmvpbx3c3c5rnzrdd-flake-inputs.drv
  /nix/store/1rbfqq2l7ggcrl8anm6a33vsmbcjd1f0-check-flake-inputs.drv