diff --git a/.gitea/workflows/build.yaml b/.gitea/workflows/build.yaml
index 6dd239c..b7966ce 100644
--- a/.gitea/workflows/build.yaml
+++ b/.gitea/workflows/build.yaml
@@ -15,6 +15,7 @@ jobs:
       - run: apk add --no-cache nodejs nix
       - name: Checkout code
         uses: actions/checkout@v4
+      - run: nix-channel --add https://nixos.org/channels/nixpkgs-unstable && nix-channel --update
       - run: nix-shell -p biber tectonic --run "tectonic Main.tex"
 
       # - name: Create Release