diff --git a/metadata.yaml b/metadata.yaml
index 25ea43d3cc95f2f14a64e382abe31018a400df5f..54062c5029df6ea0448fdf0b9826d15ccf684da9 100644
--- a/metadata.yaml
+++ b/metadata.yaml
@@ -11,3 +11,4 @@ disclaimer: |
   license.
 
   The source code of these slides can be found at <https://git.eisfunke.com/lab/fupro>.
+flake: true