these 2 derivations will be built:
  /nix/store/g17dllqinj2c3jgdp3r4vx39mj1ymhnz-flake-inputs.drv
  /nix/store/qfp3ijmjk6cxkxz9zf3q31wqa0qwx2zl-check-flake-inputs.drv