diff --git a/pkgs/applications/networking/irc/weechat/scripts/weechat-matrix/default.nix b/pkgs/applications/networking/irc/weechat/scripts/weechat-matrix/default.nix
index c42fe55169ea..c82fb9ca7395 100644
--- a/pkgs/applications/networking/irc/weechat/scripts/weechat-matrix/default.nix
+++ b/pkgs/applications/networking/irc/weechat/scripts/weechat-matrix/default.nix
@@ -73,6 +73,7 @@ in buildPythonPackage {
   postFixup = ''
     addToSearchPath program_PYTHONPATH $out/${python.sitePackages}
     patchPythonScript $out/share/matrix.py
+    substituteInPlace $out/${python.sitePackages}/matrix/server.py --replace \"matrix_sso_helper\" \"$out/bin/matrix_sso_helper\"
   '';
 
   meta = with lib; {