these 2 derivations will be built:
  /nix/store/hvcgh59zz5g71v9fijzyx19r75ixd5dv-nixos-test-driver-pg_jsonschema.drv
  /nix/store/s0lakysxrnrc8praxvxh9p7gnphaw5kb-vm-test-run-pg_jsonschema.drv