these 2 derivations will be built:
  /nix/store/qk3fq86n30zw5dsay8g7x8k0vlylifs4-nixos-test-driver-pgrouting.drv
  /nix/store/mxr3dmyzqza0bf0826mw56rg5myijzhh-vm-test-run-pgrouting.drv