these 2 derivations will be built:
  /nix/store/wvpzhyq3bvbcdlm7x0k9xk2bxb4wp7m3-generate-dependency-diagram.drv
  /nix/store/qni8pk5wbdh2k2vrm2fj3v84h3wqvh5i-check-dependency-diagram.drv