大家好，我现在在NixOS上学习SDL3，昨天还能成功编译运行一个示例代码，但今天突然不行了，换了新目录重新构建也没解决问题。我是用shell.nix来搭建开发环境的，窗口管理器用的dwm，X11环境。

现在遇到的具体错误是：

Couldn't create window and renderer: No available video device

我已经确认DISPLAY环境变量设置为:0了，也试过手动设成:1，但都没用。

下面是我的配置文件和代码：

shell.nix #

{ pkgs ? import <nixpkgs> { } }:
pkgs.mkShell {
  buildInputs = with pkgs; [
    sdl3
    pkg-config
    #SDL2.dev
    clang
    cmake
  ];

  packages = with pkgs; [
    alsa-lib
    jack2
    egl-wayland
    sdl3
    cmake
    pkg-config
    xorg.libX11
    xorg.libXext
    xorg.libXcursor
    xorg.libXi
    xorg.libXfixes
    xorg.libXrandr
    libpulseaudio
    #udev
    wayland
    libxkbcommon
  ];

  #LD_LIBRARY_PATH = "${pkgs.lib.makeLibraryPath [pkgs.libpulseaudio pkgs.udev pkgs.xorg.libX11 pkgs.xorg.libXext pkgs.wayland pkgs.libxkbcommon]}";
  #LD_PRELOAD = "${pkgs.vulkan-loader.outPath}/lib/libvulkan.so";
}

CMakeLists.txt #

cmake_minimum_required(VERSION 3.16)
project(hello)

# set the output directory for built objects.
# This makes sure that the dynamic library goes into the build directory automatically.
set(CMAKE_RUNTIME_OUTPUT_DIRECTORY "${CMAKE_BINARY_DIR}/$<CONFIGURATION>")
set(CMAKE_LIBRARY_OUTPUT_DIRECTORY "${CMAKE_BINARY_DIR}/$<CONFIGURATION>")

# This assumes the SDL source is available in vendored/SDL
add_subdirectory(vendored/SDL EXCLUDE_FROM_ALL)

# Create your game executable target as usual
add_executable(hello WIN32 hello.c)

# Link to the actual SDL3 library.
target_link_libraries(hello PRIVATE SDL3::SDL3)

hello.c #

/* Copyright (C) 1997-2025 Sam Lantinga <slouken@libsdl.org>
This software is provided 'as-is', without any express or implied warranty.
In no event will the authors be held liable for any damages arising from the use of this software.
Permission is granted to anyone to use this software for any purpose, including commercial applications, and to alter it and redistribute it freely.
*/
#define SDL_MAIN_USE_CALLBACKS 1 /* use the callbacks instead of main() */
#include <SDL3/SDL.h>
#include <SDL3/SDL_main.h>

static SDL_Window *window = NULL;
static SDL_Renderer *renderer = NULL;

/* This function runs once at startup. */
SDL_AppResult SDL_AppInit(void **appstate, int argc, char *argv[]) {
    /* Create the window */
    if (!SDL_CreateWindowAndRenderer("Hello World", 800, 600, SDL_WINDOW_FULLSCREEN, &window, &renderer)) {
        SDL_Log("Couldn't create window and renderer: %s", SDL_GetError());
        return SDL_APP_FAILURE;
    }
    return SDL_APP_CONTINUE;
}

/* This function runs when a new event (mouse input, keypresses, etc) occurs. */
SDL_AppResult SDL_AppEvent(void *appstate, SDL_Event *event) {
    if (event->type == SDL_EVENT_KEY_DOWN || event->type == SDL_EVENT_QUIT) {
        return SDL_APP_SUCCESS; /* end the program, reporting success to the OS. */
    }
    return SDL_APP_CONTINUE;
}

/* This function runs once per frame, and is the heart of the program. */
SDL_AppResult SDL_AppIterate(void *appstate) {
    const char *message = "Hello World!";
    int w = 0, h = 0;
    float x, y;
    const float scale = 4.0f;

    /* Center the message and scale it up */
    SDL_GetRenderOutputSize(renderer, &w, &h);
    SDL_SetRenderScale(renderer, scale, scale);
    x = ((w / scale) - SDL_DEBUG_TEXT_FONT_CHARACTER_SIZE * SDL_strlen(message)) / 2;
    y = ((h / scale) - SDL_DEBUG_TEXT_FONT_CHARACTER_SIZE) / 2;

    /* Draw the message */
    SDL_SetRenderDrawColor(renderer, 0, 0, 0, 255);
    SDL_RenderClear(renderer);
    SDL_SetRenderDrawColor(renderer, 255, 255, 255, 255);
    SDL_RenderDebugText(renderer, x, y, message);
    SDL_RenderPresent(renderer);

    return SDL_APP_CONTINUE;
}

/* This function runs once at shutdown. */
void SDL_AppQuit(void *appstate, SDL_AppResult result) {
}

我是按照SDL官方GitHub仓库里的CMake教程来配置的，有没有大佬能帮我看看问题出在哪？

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