Enabling submodules for self doesn't work when referencing github repo from nix run

[ElrohirGT]

Describe the bug

I'm trying to make available a rust program I made using nix and flakes. The problem is when I'm inside a local copy of the repo I can enable submodules but when I try to run the same command using the github reference, it fails with the same error it gave me at the very beginning when submodules where not enabled. (See NixOS/nix#4423 for more information on submodules and flakes).

Steps To Reproduce

Steps to reproduce the behavior:

1. git clone --recurse-submodules -j8 https://github.com/ElrohirGT/Gr-ficasComputador
2. cd Gr-ficasComputador
3. nix run '.?submodules=1#hornystein'
4. The 3rd command will probably fail in the compilation step of the program, this is fine. Is expected. What it I didn't expect was that when I try to run the same command without cloning the repo first, nix run 'github:ElrohirGT/Gr-ficasComputador?submodules=1#hornystein' it fails with:

Which is exactly the same error I was getting before finding out you need to enable submodules in your flake command.

Expected behavior

I expected the command nix run '.?submodules=1#hornystein' and nix run 'github:ElrohirGT/Gr-ficasComputador?submodules=1#hornystein' to be exactly the same in behaviour just that one uses the flake in . and the other downloads it.

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Additional context

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Metadata

Please run nix-shell -p nix-info --run "nix-info -m" and paste the result.

[user@system:~]$ nix-shell -p nix-info --run "nix-info -m"
- system: `"aarch64-darwin"`
 - host os: `Darwin 23.5.0, macOS 14.5`
 - multi-user?: `yes`
 - sandbox: `no`
 - version: `nix-env (Nix) 2.18.2`
 - channels(root): `"nixpkgs"`
 - nixpkgs: `/nix/var/nix/profiles/per-user/root/channels/nixpkgs`

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[ghpzin]

1. https://github.com/NixOS/nix is probably a better place for this issue.
   Because there is not much related to nixpkgs in how nix handles nix run, flakes or submodules.
2. You may need to use git instead of github for nix to handle submodules correctly even with ?submodules=1:
   nix run 'git+https://github.com/ElrohirGT/Gr-ficasComputador?submodules=1#hornystein'

[ElrohirGT]

1. Oh, yeah that makes sense! I'm gonna post it there right now.
2. You're right! That last command works!