diff --git a/.gitea/workflows/update-data-sources.yml b/.gitea/workflows/update-data-sources.yml
index a55491c..31b0ce6 100644
--- a/.gitea/workflows/update-data-sources.yml
+++ b/.gitea/workflows/update-data-sources.yml
@@ -24,6 +24,12 @@ jobs:
       - name: Checkout repository
         uses: actions/checkout@v2
 
+      - name: Eval flake
+        run: nix flake show .
+
+      - name: Eval upstream flake
+        run: nix flake show "git+https://git.pvv.ntnu.no/mugiten/datasources"
+
       - name: Update jmdict
         run: nix run .#update-jmdict