these 2 derivations will be built:
  /nix/store/44r88vn5dxjsyf8i4vdyxvrn7a6p7lzb-flake-inputs.drv
  /nix/store/3gnz7wv9cdi2s1h6335d1b9p1dbl86g1-check-flake-inputs.drv