In reply to @peepojuice:matrix.org
This is new, did not come up with my research yesterday, so ty. But, being new to nixos i haven't l learned flake yet, and i didn't plan on doing that today. What do i do with the flake.nix part?

 nixos-rebuild --flake /etc/nixos switch
error:
       … while calling the 'seq' builtin

         at /nix/store/r66pr19ny80412ghfmn4wa9a8yzxj3c7-source/lib/modules.nix:322:18:

          321|         options = checked options;
          322|         config = checked (removeAttrs config [ "_module" ]);
             |                  ^
          323|         _module = checked (config._module);

       … while evaluating a branch condition

         at /nix/store/r66pr19ny80412ghfmn4wa9a8yzxj3c7-source/lib/modules.nix:261:9:

          260|       checkUnmatched =
          261|         if config._module.check && config._module.freeformType == null && merged.unmatchedDefns != [] then
             |         ^
          262|           let

       (stack trace truncated; use '--show-trace' to show the full trace)

       error: undefined variable 'inputs'

       at /nix/store/k4ylkra2j2zdrygjhvywcda18i4879k8-source/configuration.nix:52:15:

           51|     enable = true;
           52|     package = inputs.nix-ld-rs.packages."${pkgs.system}".nix-ld-rs;
             |               ^
           53|   };

configuration.nix:

{
  wsl = {
    enable = true;
    defaultUser = "nixos";
  };
  
  nix.settings.experimental-features = [ "nix-command" "flakes" ];


  programs.nix-ld = {
    enable = true;
    package = inputs.nix-ld-rs.packages."${pkgs.system}".nix-ld-rs;
  };
}

flake:

{
  inputs = {
    nixpkgs.url = "nixpkgs";
    nixos-wsl = {
      url = "github:nix-community/NixOS-WSL";
      inputs.nixpkgs.follows = "nixpkgs";
    };
    nix-ld-rs = {
      url = "github:nix-community/nix-ld-rs";
      inputs.nixpkgs.follows = "nixpkgs";
    };
  };

  outputs = inputs: with inputs; {
    nixosConfigurations.nixos = nixpkgs.lib.nixosSystem {
      system = "x86_64-linux";
      specialArgs = { inherit inputs; };
      modules = [
        nixos-wsl.nixosModules.default
        ./configuration.nix
      ];
    };
  };
}