these 2 derivations will be built:
  /nix/store/nml3zjysvnnsnr7jr9pldrjl3d1m7y1p-flake-inputs.drv
  /nix/store/ki7hkgq6nz0wg8yf5v1m4jf2b7fy4f8g-check-flake-inputs.drv