these 2 derivations will be built:
  /nix/store/v1865hm2nljfp4vw7caxvq25lxma1j7h-flake-inputs.drv
  /nix/store/x1lv7bvibdkxvz0c40c8iah8r7g4c7ql-check-flake-inputs.drv