these 2 derivations will be built:
  /nix/store/fqaznic3fkibi9xh2cydf730fh8l6yz6-nixos-test-driver-pg_stat_monitor.drv
  /nix/store/dmwnky5yjqks331fzhf2fr0bjzwcwngz-vm-test-run-pg_stat_monitor.drv