Including git submodules

[hldup]

Hey, I have a big workspace project with multiple submodules.
I have included them in my inputs as a local repo but whenever I try to build any of my packages or enter the developer shell I get an error from fileSetForCreate that none of my git submodules exist.

error: lib.fileset.unions: Element 5 (/nix/.../modules/module1) is a path that does not exist.

A narrowed down example of my setup:

  module1 = {
        url = "git+file:./modules/module1";
        inputs.nixpkgs.follows = "nixpkgs";
      };
      ...

project-root/
├── modules/
│   ├── module1
│   └── module2
└── flake.nix

     fileSetForCrate = crate: lib.fileset.toSource {
            root = ./.;
            fileset = lib.fileset.unions [
              ./Cargo.toml
              ./Cargo.lock
              ./modules/module1
              ./modules/module2
              crate
            ];
          };

Any ideas how to fix this?

[hldup]

Ok turns out it was nix being silly all together, I hate how it handles submodules.

 nix develop "git+file://$(pwd)?submodules=1"

This command allows me to enter my developer shell and also by including SUBMODULES=true variable before nix build I get the results I wanted.