diff --git a/.github/workflows/build-windows.yml b/.github/workflows/build-windows.yml
index e2a685ac..361d3250 100644
--- a/.github/workflows/build-windows.yml
+++ b/.github/workflows/build-windows.yml
@@ -60,6 +60,22 @@ jobs:
       - name: Build shared package
         run: pnpm --filter @backspace/shared build
 
+      # O postinstall termina em `|| console.warn` para que quem não tem
+      # ferramentas de build consiga instalar. No CI isso transforma falha em
+      # sucesso silencioso: o instalador sai sem o módulo nativo e o app
+      # compartilha tela sem som, sem erro nenhum. Então verifica-se o
+      # resultado em vez de confiar no código de saída.
+      - name: Verify native audio module compiled
+        shell: bash
+        run: |
+          found=$(find node_modules/.pnpm -path '*electron-native-screenshare*' -name '*.node' 2>/dev/null | head -5)
+          if [ -z "$found" ]; then
+            echo "::error::electron-native-screenshare has no compiled .node — the installer would ship without system-audio capture"
+            find node_modules/.pnpm -maxdepth 1 -name 'electron-native-screenshare*' -printf '%p\n' 2>/dev/null || true
+            exit 1
+          fi
+          echo "OK:"; echo "$found"
+
       - name: Compile desktop TypeScript
         working-directory: packages/desktop
         run: pnpm exec tsc
diff --git a/package.json b/package.json
index a511aaca..5ef88906 100644
--- a/package.json
+++ b/package.json
@@ -2,7 +2,7 @@
   "name": "backspace",
   "version": "1.1.0",
   "private": true,
-  "description": "Open, self-hosted communication platform — text, voice, video, and federation",
+  "description": "Open, self-hosted communication platform \u2014 text, voice, video, and federation",
   "license": "AGPL-3.0-only",
   "author": "Jannis Braun",
   "homepage": "https://github.com/TheZwiss/backspace",
@@ -32,8 +32,9 @@
   "pnpm": {
     "onlyBuiltDependencies": [
       "better-sqlite3",
-      "esbuild",
       "electron",
+      "electron-native-screenshare",
+      "esbuild",
       "sharp"
     ],
     "patchedDependencies": {
diff --git a/packages/desktop/package.json b/packages/desktop/package.json
index 810a33fd..7dc70bfa 100644
--- a/packages/desktop/package.json
+++ b/packages/desktop/package.json
@@ -18,7 +18,7 @@
     "clean": "rm -rf dist dist-electron",
     "test": "vitest run",
     "test:watch": "vitest",
-    "postinstall": "electron-rebuild -f -w uiohook-napi -w electron-native-screenshare || node -e \"console.warn('[desktop] uiohook-napi native rebuild skipped - needs build tools (make, g++, python3). Only required to RUN the desktop app; the server, web client, and Docker image are unaffected.')\""
+    "postinstall": "electron-rebuild -f -w uiohook-napi,electron-native-screenshare || node -e \"console.warn('[desktop] uiohook-napi native rebuild skipped - needs build tools (make, g++, python3). Only required to RUN the desktop app; the server, web client, and Docker image are unaffected.')\""
   },
   "dependencies": {
     "electron-native-screenshare": "^1.2.0",