these 2 derivations will be built:
  /nix/store/irm5pm7py5ks73fx7j7gly9k4jq35wax-nixos-test-driver-pg_stat_monitor.drv
  /nix/store/yiax8cd0k16xqwvjy0wmw4s9lbimkmh1-vm-test-run-pg_stat_monitor.drv