these 2 derivations will be built:
  /nix/store/50lkqs1rg5p0jvs4f0zk4wyp0pqk9mhv-flake-inputs.drv
  /nix/store/ywpbx2wvz7va4kq9441b3a8fsj28pq92-check-flake-inputs.drv