From 4aa2488fd1029d02f15f340ecd89b5e3d361a527 Mon Sep 17 00:00:00 2001
From: Maximilian Bosch <maximilian@mbosch.me>
Date: Tue, 24 Aug 2021 21:28:15 +0200
Subject: [PATCH] mautrix-telegram: fix crash

The previous backport of `mautrix-telegram`[1] appears to be a mistake
of mine (sorry for that!), unfortunately v0.9 isn't forward-compatible
due to a database migration, so this change can't be reversed.

The primary issue was that `telethon` was too old, so I decided to
upgrade it to 1.21 which is what I had on my 21.05-based tracking
branch while using `mautrix-telegram` anyways, so that's proven to work.

Closes #135583

[1] e1042038ac15ad7cf447fa1ed23a3746ee5d8331 / cd84b8ad8b2f64f6ccf1f27b910bcdd274585fb0
---
 pkgs/servers/mautrix-telegram/default.nix | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/pkgs/servers/mautrix-telegram/default.nix b/pkgs/servers/mautrix-telegram/default.nix
index eba429e8cce..bb2549f939f 100644
--- a/pkgs/servers/mautrix-telegram/default.nix
+++ b/pkgs/servers/mautrix-telegram/default.nix
@@ -12,6 +12,13 @@ let
           sha256 = "ffbc4e29eb56089539b408f8e4c12a5d5a5d11d7fe7d40f8c6279784c618b869";
         };
       });
+      telethon = super.telethon.overridePythonAttrs (oldAttrs: rec {
+        version = "1.21.1";
+        src = oldAttrs.src.override {
+          inherit version;
+          sha256 = "sha256-mTyDfvdFrd+XKifXv7oM5Riihj0aUOBzclW3ZNI+DvI=";
+        };
+      });
     };
   };