changes for nix

shell.nix

@@ -0,0 +1,25 @@
+{pkgs ? import <nixpkgs> {}}:
+pkgs.mkShell {
+  buildInputs = with pkgs; [
+    # Compiler and Build Tools
+    gnumake
+
+    # Windowing and Graphics
+    glfw3
+    libGL
+    libGLU
+    alsa-lib
+
+    # Common X11 dependencies (often required by GLFW)
+    xorg.libX11
+    xorg.libXrandr
+    xorg.libXinerama
+    xorg.libXcursor
+    xorg.libXi
+  ];
+
+  shellHook = ''
+    export LD_LIBRARY_PATH="${pkgs.libGL}/lib:${pkgs.lib.makeLibraryPath [pkgs.glfw3]}:$LD_LIBRARY_PATH"
+    echo "OpenGL and GLFW environment loaded!"
+  '';
+}