python3Packages.django_6: fix flaky test on aarch64-linux

(cherry picked from commit 83f160689f)

pkgs/development/python-modules/django/6.nix

@@ -62,6 +62,9 @@ buildPythonPackage (finalAttrs: {
     ./6.x/pythonpath.patch
     # test_incorrect_timezone should raise but doesn't
     ./6.x/disable-failing-test.patch
+    # https://code.djangoproject.com/ticket/36997
+    # https://github.com/django/django/pull/21019
+    ./6.x/invalidate-importlib-cache.patch
   ]
   ++ lib.optionals withGdal [
     (replaceVars ./6.x/gdal.patch {

pkgs/development/python-modules/django/6.x/invalidate-importlib-cache.patch

@@ -0,0 +1,54 @@
+From 130ccbf51a5ad4810dcef46584661a818b7964d3 Mon Sep 17 00:00:00 2001
+From: gghezext <gghezext@comgest.com>
+Date: Sun, 29 Mar 2026 03:46:48 +0200
+Subject: [PATCH 1/2] Fixed #36997 -- Invalidated importlib caches after
+ writing migration files.
+
+---
+ django/core/management/commands/makemigrations.py   | 3 +++
+ django/core/management/commands/squashmigrations.py | 2 ++
+ docs/releases/6.1.txt                               | 5 ++++-
+ 3 files changed, 9 insertions(+), 1 deletion(-)
+
+diff --git a/django/core/management/commands/makemigrations.py b/django/core/management/commands/makemigrations.py
+index 7f711ed7aec4..355d626ce2c4 100644
+--- a/django/core/management/commands/makemigrations.py
++++ b/django/core/management/commands/makemigrations.py
+@@ -1,3 +1,4 @@
++import importlib
+ import os
+ import sys
+ import warnings
+@@ -395,6 +396,7 @@ def write_migration_files(self, changes, update_previous_migration_paths=None):
+                     )
+                     self.log(writer.as_string())
+         run_formatters(self.written_files, stderr=self.stderr)
++        importlib.invalidate_caches()
+ 
+     @staticmethod
+     def get_relative_path(path):
+@@ -502,6 +504,7 @@ def all_items_equal(seq):
+                     with open(writer.path, "w", encoding="utf-8") as fh:
+                         fh.write(writer.as_string())
+                     run_formatters([writer.path], stderr=self.stderr)
++                    importlib.invalidate_caches()
+                     if self.verbosity > 0:
+                         self.log("\nCreated new merge migration %s" % writer.path)
+                         if self.scriptable:
+diff --git a/django/core/management/commands/squashmigrations.py b/django/core/management/commands/squashmigrations.py
+index 9845b4d4567b..abc87717b66b 100644
+--- a/django/core/management/commands/squashmigrations.py
++++ b/django/core/management/commands/squashmigrations.py
+@@ -1,3 +1,4 @@
++import importlib
+ import os
+ import shutil
+ 
+@@ -208,6 +209,7 @@ def handle(self, **options):
+         with open(writer.path, "w", encoding="utf-8") as fh:
+             fh.write(writer.as_string())
+         run_formatters([writer.path], stderr=self.stderr)
++        importlib.invalidate_caches()
+ 
+         if self.verbosity > 0:
+             self.stdout.write(