From 28ac86d81f9b3e430dbece3308c3ef44c67844fa Mon Sep 17 00:00:00 2001
From: Hermes Agent <hermes-agent@bueso.me>
Date: Thu, 28 May 2026 09:14:13 +0200
Subject: [PATCH] fix: unset PYTHONPATH in nextcloud-mcp-server wrapper

Prevents Python 3.12 site-packages (from host env like mautrix bridge) from contaminating the Python 3.13 wrapper, causing C extension ABI mismatches (e.g. PIL._imaging).
---
 packages/nextcloud-mcp-server/package.nix | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/packages/nextcloud-mcp-server/package.nix b/packages/nextcloud-mcp-server/package.nix
index 1e319e1..3c2cb20 100644
--- a/packages/nextcloud-mcp-server/package.nix
+++ b/packages/nextcloud-mcp-server/package.nix
@@ -178,6 +178,12 @@ python3Packages.buildPythonApplication rec {
       --replace-quiet '">=2.4.5"' '""'
   '';
 
+  # PYTHONPATH from the host environment (e.g., mautrix bridge injecting
+  # Python 3.12 site-packages) causes C extension ABI mismatches on NixOS.
+  # The wrapper's own sys.path has the correct closure packages, so we
+  # unset the external PYTHONPATH to prevent contamination.
+  makeWrapperArgs = [ "--unset" "PYTHONPATH" ];
+
   dontCheckRuntimeDeps = true;
   catchConflicts = false;