NoImplicitPrelude language extension; add Relude dependency

package.nix

@@ -9,6 +9,7 @@
   ghcPackages = p: [
     p.OpenGL
     p.GLFW-b
+    p.relude
   ];
 in
   stdenv.mkDerivation {
@@ -17,12 +18,8 @@ in
     src = ./src;
     nativeBuildInputs = [
       (haskellPackages.ghcWithPackages ghcPackages)
-      pkgs.libGL
-      pkgs.libGLU
     ];
     buildInputs = [
-      pkgs.libGL
-      pkgs.libGLU
     ];
     configurePhase = ''
     '';