these 2 derivations will be built:
  /nix/store/i6h0541bsz5sdz5zd3822fmq2nncnhbw-nixos-test-driver-pg_stat_monitor.drv
  /nix/store/89xb4d2cgr611cxbg7lkb240bfkfyv4q-vm-test-run-pg_stat_monitor.drv