these 2 derivations will be built:
  /nix/store/qh5czk0fny8w1k3fcqz5ihd16caacrnd-nixos-test-driver-pgrouting.drv
  /nix/store/wc5jlswlpk869apvm0ax2z1292nmghs6-vm-test-run-pgrouting.drv