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 07e4dd54e5e..20aebebf7da 100644
--- a/pkgs/applications/networking/irc/weechat/scripts/weechat-matrix/default.nix
+++ b/pkgs/applications/networking/irc/weechat/scripts/weechat-matrix/default.nix
@@ -70,6 +70,10 @@ in buildPythonPackage {
   '';
 
   dontPatchShebangs = true;
+  postFixup = ''
+    addToSearchPath program_PYTHONPATH $out/${python.sitePackages}
+    patchPythonScript $out/share/matrix.py
+  '';
 
   meta = with lib; {
     description = "A Python plugin for Weechat that lets Weechat communicate over the Matrix protocol";