these 2 derivations will be built:
  /nix/store/1pgi5zghqrl5bkndm73lrxhxbh0kqh0z-nixos-test-driver-hypopg.drv
  /nix/store/aazp54f381hzjxzdmv2zk9r6vls387yy-vm-test-run-hypopg.drv