fix(modules/matrix-bridge): fix KeyError on encryption

This commit fixes the issue where the client would fail to initialise if
encryption was enabled, by pinning mautrix to 0.19, which is the last
supported version.

1 files changed, 8 insertions, 1 deletions

diff --git a/modules/services/matrix-bridge.nix b/modules/services/matrix-bridge.nix
index 96250f1..208f8ff 100644
--- a/modules/services/matrix-bridge.nix
+++ b/modules/services/matrix-bridge.nix
@@ -1,4 +1,4 @@
-{ config, lib, ... }:
+{ config, lib, pkgs, ... }:
 
 with lib;
 let
@@ -63,6 +63,13 @@ in
 
     services.mautrix-signal = {
       enable = true;
+      package = pkgs.mautrix-signal.overrideAttrs (prev: {
+        propagatedBuildInputs = (lib.lists.remove pkgs.python3Packages.mautrix prev.propagatedBuildInputs) ++ [
+          # mautrix-signal wants <0.20, but nix supplies >=0.20
+          pkgs.python3Packages.mautrix_0_19
+        ];
+      });
+
       environmentFile = cfg.secrets.mautrix-envs;
       serviceDependencies = [ "matrix-synapse.service" ];