these 2 derivations will be built:
  /nix/store/kvwgad62m2gj8qza0ycfijiyys26kc7p-nixos-test-driver-pg_jsonschema.drv
  /nix/store/zsrqyc47l5czvsfxl2yi8rm0kzb2kcy5-vm-test-run-pg_jsonschema.drv