these 7 derivations will be built:
  /nix/store/smw5h4fvp1hrv4yyc39ia74xid73zc7y-nixos-system-server-test.drv
  /nix/store/l6qyzad704wmxl1kcg3g2762nzsqlwbn-nixos-system-server-test.drv
  /nix/store/vv87h325cwx7l6614s2wy64idjzhaqs6-closure-info.drv
  /nix/store/lfid31ibnafsa2123m7xd4f309w4k5pc-run-nixos-vm.drv
  /nix/store/bfcg7ns7p58d323zsvd7xb3676lajkrr-nixos-vm.drv
  /nix/store/ynpigjmd3zf7ryanrs58yy9qirss4w8c-nixos-test-driver-http.drv
  /nix/store/l7aarbd4lml1w65xx2hpwif66fppqrhm-vm-test-run-http.drv