This way we can actually build and run a node using just:
```sh
nix run 'github:status-im/nimbus-eth2?submodules=1'
```
The `?submodules=1` part should eventually not be necessary.
For more details see:
https://github.com/NixOS/nix/issues/4423
Signed-off-by: Jakub Sokołowski <jakub@status.im>
