these 2 derivations will be built:
  /nix/store/nw0vdrjp6m96rgqa8bjwb4dzm0997317-nixos-test-driver-pg_stat_monitor.drv
  /nix/store/pzrzyqhcj89m4cdbjx58ppvndn8fafxd-vm-test-run-pg_stat_monitor.drv