these 2 derivations will be built:
  /nix/store/gl1z6g2p47kyc5mksd66nlcsv68mq6xq-nixos-test-driver-hypopg.drv
  /nix/store/2cf4hdp7xw0kj3kpn3xjvkf7nr61amf8-vm-test-run-hypopg.drv