SDL_sound: fix cross build (#367712)

Author: uninsane

pkgs/by-name/sd/SDL_sound/package.nix

@@ -19,10 +19,6 @@ stdenv.mkDerivation (finalAttrs: {
     hash = "sha256-OZn9C7tIUomlK+FLL2i1ccuE44DMQzh+rfd49kx55t8=";
   };
 
-  nativeBuildInputs = [
-    SDL
-  ];
-
   buildInputs = [
     SDL
     flac
@@ -34,6 +30,8 @@ stdenv.mkDerivation (finalAttrs: {
     (lib.enableFeature enableSdltest "sdltest")
   ];
 
+  env.SDL_CONFIG = lib.getExe' SDL.dev "sdl-config";
+
   strictDeps = true;
 
   meta = {