these 2 derivations will be built:
  /nix/store/4w5vjzrbkdqx5s2w86vby6lpcsklpz9k-nixos-test-driver-pgjwt.drv
  /nix/store/m15a1qbriaamzvy3y01jnbxkb2435vav-vm-test-run-pgjwt.drv