these 2 derivations will be built:
  /nix/store/s8vcxc3z08d499flq5ribr11iyaz3zxk-nixos-test-driver-pg_stat_monitor.drv
  /nix/store/hjqv7qn8pks0dpf4c8nkq70ian2b72fd-vm-test-run-pg_stat_monitor.drv