these 2 derivations will be built:
  /nix/store/z1q3jypgq9s0jh4n4zbb51mnngcjlhv2-nixos-test-driver-pg_jsonschema.drv
  /nix/store/yd61kli6bnvgg1f8bksrpvgypz7p19f8-vm-test-run-pg_jsonschema.drv