diff --git a/.github/workflows/build-client.yml b/.github/workflows/build-client.yml
index c95263f..0d2d717 100644
--- a/.github/workflows/build-client.yml
+++ b/.github/workflows/build-client.yml
@@ -356,6 +356,12 @@ jobs:
       # 那几处在 job 内的写探测里实测可写。换一台 Windows runner 时改这几行。
       RUSTUP_HOME: C:\Users\admin\runner\windows\cache\ci-rustup
       CARGO_HOME: C:\Users\admin\runner\windows\cache\ci-cargo
+      # LOCALAPPDATA/APPDATA 也得改：pnpm 12 的 store 锁与 cache/state 都挂在
+      # %LOCALAPPDATA% 下（报错原文：pnpm-store-operation-locks\all-stores.lock:
+      # 拒绝访问），tauri 打包时下载的 NSIS 也放这儿。本机实测：把 LOCALAPPDATA
+      # 指到可写目录后，pnpm 会在那里建 pnpm-cache / pnpm-state，install 正常。
+      LOCALAPPDATA: C:\Users\admin\runner\windows\cache\ci-localappdata
+      APPDATA: C:\Users\admin\runner\windows\cache\ci-appdata
       npm_config_cache: C:\Users\admin\runner\windows\cache\ci-npm
       npm_config_store_dir: C:\Users\admin\runner\windows\cache\ci-pnpm-store
       RUNNER_TOOL_CACHE: C:\Users\admin\runner\windows\cache\ci-toolcache