dev: add flake for dev shell

flake.nix

@@ -0,0 +1,24 @@
+{
+    description = "ergogen dev env";
+
+    #inputs.nixpkgs.url = "github:nixos/nixpkgs/nixos-24.11";       Uses the cuda driver installed on the system, hence commented out.
+    #inputs.nixpkgs.url = "github:nixos/nixpkgs/nixos-unstable";    Forcing a specific version will likely result in conflicts!
+
+    outputs = { self, nixpkgs }:
+    let
+        system = "x86_64-linux";
+        pkgs = import nixpkgs { inherit system; config.cudaSupport = true; config.cudnnSupport = true; config.allowUnfree = true; };
+    in {
+        devShells.${system}.default = pkgs.mkShell {
+
+            buildInputs = with pkgs; [
+              ergogen
+            ];
+
+            shellHook = ''
+              echo loaded ergogen shell
+            '';
+        };
+    };
+}
+