these 2 derivations will be built:
  /nix/store/vzr0cjdqnigzmbhql8d7bjsb4ydcbg4r-flake-inputs.drv
  /nix/store/gvqr5q2r81wg2i8f3dmq8jxs8l9wzjci-check-flake-inputs.drv