these 2 derivations will be built:
  /nix/store/gf9zqwrcg3qyi0hm4b4fvp9skbm8gbsl-nixos-test-driver-pg_hashids.drv
  /nix/store/xbq9gn8as7m8vbi09vkh3m76mf00i3m8-vm-test-run-pg_hashids.drv