diff --git a/wails.json b/wails.json
index 197e4f951..f0e87be49 100644
--- a/wails.json
+++ b/wails.json
@@ -18,8 +18,12 @@
     "copyright": "Copyright 2026 Syngnat",
     "comments": "GoNavi is licensed under the Apache License, Version 2.0."
   },
+  "preBuildHooks": {
+    "*/*": "node -e \"const fs=require('node:fs');const src='../../tools/stub-dist.zip';const dst='../../frontend/dist.zip';if(!fs.existsSync(dst)){fs.copyFileSync(src,dst)}\""
+  },
   "postBuildHooks": {
-    "darwin/*": "bash ../../scripts/codesign-dev-app.sh ${bin}"
+    "darwin/*": "bash ../../scripts/codesign-dev-app.sh ${bin}",
+    "*/*": "node -e \"const fs=require('node:fs');const stub=fs.readFileSync('../../tools/stub-dist.zip');const dist=fs.readFileSync('../../frontend/dist.zip');if(stub.equals(dist)){fs.rmSync(process.argv[1],{force:true});console.error('frontend/dist.zip is still a stub; build the frontend before using -s');process.exit(1)}\" ${bin}"
   },
   "debounceMS": 100,
   "appargs": ""