these 2 derivations will be built:
  /nix/store/b9mglv9c1lxpl9wvqb9x1svkl2sjzf1n-nix-unit-2.35.1.drv
  /nix/store/z4xvigvvgz07rvsvzcsf6xmij9bqgvma-nix-unit-check.drv