these 2 derivations will be built:
  /nix/store/fphay9sd7yk346d2mcwk2pyhclykb4wq-nixos-test-driver-pgmq.drv
  /nix/store/pjf5ry0xmmmsfdlv6aqqdfwy4vx1vm01-vm-test-run-pgmq.drv