these 2 derivations will be built:
  /nix/store/a7lqlscl982wicfw8nw786q44qaqxrks-nixos-test-driver-pg_stat_monitor.drv
  /nix/store/5xmdjyzpi9bxy8q73giny7d1xkad2hx5-vm-test-run-pg_stat_monitor.drv