these 2 derivations will be built:
  /nix/store/csgjdmqc2ri8mhw9x2h8j0f4q34sjny1-nixos-test-driver-pg_jsonschema.drv
  /nix/store/hahfd5hra4k8ijz2zil1fd1ad9h41kq0-vm-test-run-pg_jsonschema.drv