these 12 derivations will be built:
  /nix/store/phdqn81rpjdk9drlfhag2z0pk29al8fr-init-old.drv
  /nix/store/08r4acb8lbhkzhfxfwis7s2lbrjz133r-unit-postgresql.service.drv
  /nix/store/8s8gb0kv7152xfa91q46vwkf2aqmmggi-system-units.drv
  /nix/store/gdg8vrvnrb20g89pqjyhz4rilzxqrf51-etc.drv
  /nix/store/zyq21z8faaksx257c8h9srs76kg4z19p-activate.drv
  /nix/store/rc2nsbg5sqayh8cjlm74khdlwxklylrf-nixos-system-server-test.drv
  /nix/store/n2466r9b1k8dhzqf91arsfiaa97cbyri-closure-info.drv
  /nix/store/5b67v1r2wd3bggb8hm9znm16zi6vbd2h-run-nixos-vm.drv
  /nix/store/6vymmxykw7p7qw3nv3n0c3v24c5x2flq-drive.drv
  /nix/store/fxqmgxf9srd1zra0mbymxc3wcrr6dp5c-nixos-vm.drv
  /nix/store/xpiwd83w57q86lm22bwxcqn97xr5lxd7-nixos-test-driver-pg-upgrade-start-guard.drv
  /nix/store/76xiqfraqyg0f1jx267kaafkn58n9s29-vm-test-run-pg-upgrade-start-guard.drv