these 2 derivations will be built:
  /nix/store/2hvcgd2cday69fqpyrriscnbczd1lzhk-nixos-test-driver-pg_jsonschema.drv
  /nix/store/xd422cqw3v297czxwqf1bwabvr0gslmy-vm-test-run-pg_jsonschema.drv