these 2 derivations will be built:
  /nix/store/6v0kqjz5yp7dwygf016fhky6y6sw7zyh-nixos-test-driver-pgjwt.drv
  /nix/store/yszs4xpxgzwygp6vshlp1dxgsrxljhag-vm-test-run-pgjwt.drv