these 2 derivations will be built:
  /nix/store/n0dhbfq66bmz4w5fnw6l27r53sgx2asy-nixos-test-driver-pgmq.drv
  /nix/store/1b2x8wjj4h8wa3v57xa0p10q3vzsmsga-vm-test-run-pgmq.drv