these 2 derivations will be built:
  /nix/store/hq3qvii10wq0gfi9wk9h0raf0qrg6liy-nixos-test-driver-pgmq.drv
  /nix/store/637yzrkrr1c0xkk1nv6wdlrz8k6j1vss-vm-test-run-pgmq.drv