these 2 derivations will be built:
  /nix/store/7msrkcr12zn0ff4vrydxwmh6d2q1a6nq-flake-inputs.drv
  /nix/store/qxhvjkxfn6vpjv5z9v7p9jcmwlc71nhg-check-flake-inputs.drv