mailmanPackages: pin older django-allauth

pkgs/servers/mail/mailman/python.nix

@@ -1,4 +1,4 @@
-{ python3, fetchPypi, lib, overlay ? (_: _: {}) }:
+{ python3, lib, overlay ? (_: _: {}) }:
 
 lib.fix (self: python3.override {
   inherit self;
@@ -20,6 +20,14 @@ lib.fix (self: python3.override {
         [2] f931bc81d63f5cfda55ac73d754c87b3fd63b291
       */
 
+      django-allauth = super.django-allauth.overrideAttrs (new: { src, ... }: {
+        version = "0.63.6";
+        src = src.override {
+          tag = new.version;
+          hash = "sha256-13/QbA//wyHE9yMB7Jy/sJEyqPKxiMN+CZwSc4U6okU=";
+        };
+      });
+
       # the redis python library only supports hiredis 3+ from version 5.1.0 onwards
       hiredis = super.hiredis.overrideAttrs (new: { src, ... }: {
         version = "3.1.0";