these 2 derivations will be built:
  /nix/store/lr4vl6124lyg9mwmdiak3l8xilpzz1js-nixos-test-driver-pg_stat_monitor.drv
  /nix/store/08niq39dvbpr836d474mja5y1cyam9if-vm-test-run-pg_stat_monitor.drv