From c3fac8e905033d97e4fc6d39dbc7af51accdd721 Mon Sep 17 00:00:00 2001
From: Ofir Gluzman <ogluzman@lightricks.com>
Date: Sun, 8 Mar 2026 14:11:40 +0200
Subject: [PATCH] Set PYTHONNOUSERSITE=1 to isolate bundled Python from system
 packages

A system-wide Python 3.13 installation can leak user site-packages
(e.g. torchvision) into the bundled runtime, causing import conflicts
that crash the backend on startup.

Fixes part of https://github.com/Lightricks/LTX-Desktop/issues/7

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
---
 electron/python-backend.ts | 1 +
 1 file changed, 1 insertion(+)

diff --git a/electron/python-backend.ts b/electron/python-backend.ts
index 0a1c30c3..5d489bf0 100644
--- a/electron/python-backend.ts
+++ b/electron/python-backend.ts
@@ -221,6 +221,7 @@ export async function startPythonBackend(): Promise<void> {
       env: {
         ...process.env,
         PYTHONUNBUFFERED: '1',
+        PYTHONNOUSERSITE: '1',
         LTX_PORT: String(PYTHON_PORT),
         LTX_APP_DATA_DIR: getAppDataDir(),
         PYTORCH_ENABLE_MPS_FALLBACK: '1',