these 6 derivations will be built:
  /nix/store/kwp6fakf621ml9pc0malmx83iw1kxifq-nixos-system-server-test.drv
  /nix/store/ba2w1ww8izrvd5hrqna63h1kalsv2hd3-closure-info.drv
  /nix/store/fzkd8f9wb2ljygg42wxp28ciw7xpl38h-run-nixos-vm.drv
  /nix/store/4mrs06xn526pnh8gb0p7lbf542bv6pgv-nixos-vm.drv
  /nix/store/gznjpghpzd0mmm9d0qspv6yd2lb9rcdy-nixos-test-driver-pgmq.drv
  /nix/store/42w5v7w1q0vbw79rv4qjkziaazgf6sw8-vm-test-run-pgmq.drv