diff --git a/slides/flake.nix b/slides/flake.nix
index de79ed6..1e26060 100644
--- a/slides/flake.nix
+++ b/slides/flake.nix
@@ -37,7 +37,7 @@
               pip install mkslides --upgrade
               deactivate
               alias mkslides='.venv/bin/mkslides'
-              mkslides serve demo.md
+              .venv/bin/mkslides serve demo.md
           '';
         };
       }