these 2 derivations will be built:
  /nix/store/lrif4l4m3y383m29c547pf5ia7h0j25g-nixos-test-driver-pg_stat_monitor.drv
  /nix/store/lpvmd0jik3kqi23v1hw039b8m68k05da-vm-test-run-pg_stat_monitor.drv