diff --git a/flake.nix b/flake.nix
index c066364..fb3f1f4 100644
--- a/flake.nix
+++ b/flake.nix
@@ -84,7 +84,8 @@
         in
         {
           nix-builder-autoscaler = venv;
-          buildbot-autoscale-ext = buildbotExtVenv;
+          buildbot-autoscale-ext = buildbotExtPythonSet."buildbot-autoscale-ext";
+          buildbot-autoscale-ext-venv = buildbotExtVenv;
           default = venv;
         }
       );