diff --git a/apps/desktop/electron-builder.ts b/apps/desktop/electron-builder.ts
index a1e7f94d18..559b511286 100644
--- a/apps/desktop/electron-builder.ts
+++ b/apps/desktop/electron-builder.ts
@@ -8,7 +8,8 @@ Please see LICENSE in the repository root for full details.
 import * as os from "node:os";
 import * as fs from "node:fs";
 import path from "node:path";
-import { type Configuration as BaseConfiguration } from "electron-builder";
+import { type Configuration as BaseConfiguration, log } from "electron-builder";
+import { LogMessageByKey } from "app-builder-lib/out/node-module-collector/moduleManager.js";
 
 /**
  * This script has different outputs depending on your os platform.
@@ -239,4 +240,17 @@ if (os.platform() === "linux") {
     }
 }
 
+// Treat certain warnings as a fatal error
+const FATAL_WARNINGS = [LogMessageByKey.PKG_NOT_ON_DISK, LogMessageByKey.PKG_NOT_FOUND];
+// Otherwise we just burn time running the tests for no reason.
+if (typeof log !== "undefined") {
+    const prevTransform = log.messageTransformer;
+    log.messageTransformer = (message, level) => {
+        if (level === "warn" && FATAL_WARNINGS.some((w) => message.startsWith(w))) {
+            throw new Error(`electron-builder: ${message}`);
+        }
+        return prevTransform?.(message, level) ?? message;
+    };
+}
+
 export default config;