diff --git a/src/script_chainer/utils/runner_utils.py b/src/script_chainer/utils/runner_utils.py
index c467b76..1f05f19 100644
--- a/src/script_chainer/utils/runner_utils.py
+++ b/src/script_chainer/utils/runner_utils.py
@@ -2,8 +2,13 @@
 
 import os
 import sys
+from one_dragon.utils.os_utils import get_work_dir, get_path_under_work_dir
 
 
+def get_launcher_path() -> str:
+    """获取 launcher 路径。"""
+    return get_path_under_work_dir("src", "script_chainer", "win_exe", "launcher.py")
+
 def build_runner_command(chain_name: str, script_index: int | None = None) -> tuple[list[str], str | None]:
     """构造 runner 启动命令。
 
@@ -13,19 +18,21 @@ def build_runner_command(chain_name: str, script_index: int | None = None) -> tu
 
     Returns:
         启动命令及其工作目录。
-
-    Raises:
-        RuntimeError: 源码模式下不支持运行脚本链。
     """
+    common_args = ["--onedragon", "--chain", chain_name]
+    if script_index is not None:
+        common_args.extend(["--debug-index", str(script_index)])
+
+    # 可执行文件模式
     if getattr(sys, 'frozen', False):
+        command = [sys.executable, *common_args]
+        return command, os.path.dirname(sys.executable) or None
+    else: # 源码模式
+        repo_root = get_work_dir()
+        launcher_path = get_launcher_path()
         command = [
             sys.executable,
-            '--onedragon',
-            '--chain',
-            chain_name,
+            launcher_path,
+            *common_args,
         ]
-        if script_index is not None:
-            command.extend(['--debug-index', str(script_index)])
-        return command, os.path.dirname(sys.executable) or None
-
-    raise RuntimeError('源码模式下不支持运行脚本链，请使用打包后的程序。')
+        return command, repo_root