these 2 derivations will be built:
  /nix/store/a01nij905lmv36kn1fpqlhvbq5bfpban-nixos-test-driver-pgrouting.drv
  /nix/store/7lp6snkj3ghwyjbskwwxd18nb8h7v3b3-vm-test-run-pgrouting.drv