diff --git a/third_party/default.nix b/third_party/default.nix
index 86d98c6fbd..c9a75f2733 100644
--- a/third_party/default.nix
+++ b/third_party/default.nix
@@ -15,6 +15,8 @@ let
       factorio-experimental = pkgs.factorio-experimental.override depot.ops.secrets.factorio;
       ntfy = (pkgs.ntfy.override {
         withXmpp = false;
+        withSlack = false;
+        python39 = pkgs.python3;
       }).overridePythonAttrs (oldAttrs: {
         doCheck = false;
         checkPhase = "";