these 2 derivations will be built:
  /nix/store/xldvzwx7ap2bak1dbc9jvnvkqfpfkvj5-nixos-test-driver-pg_stat_monitor.drv
  /nix/store/23ghvywbgmc9hgf9yj8grm9i3izb28qz-vm-test-run-pg_stat_monitor.drv