these 2 derivations will be built:
  /nix/store/j52c6vwfykksv1z0ac12b9idfvshh1vm-nixos-test-driver-hypopg.drv
  /nix/store/vr1bsang9kgqcrjk1p3fvapv6pqslxsq-vm-test-run-hypopg.drv