these 2 derivations will be built:
  /nix/store/wlrb6a4r9pwv7l6anfi1rkmqvfblz0ys-nixos-test-driver-pgmq.drv
  /nix/store/mxf4jfrywvcrn8z7fxbllnr74q10b6n8-vm-test-run-pgmq.drv