diff --git a/.gitea/workflows/build.yaml b/.gitea/workflows/build.yaml
index de606d5..6dd239c 100644
--- a/.gitea/workflows/build.yaml
+++ b/.gitea/workflows/build.yaml
@@ -12,10 +12,10 @@ jobs:
       image: alpine:latest
       options: --user root
     steps:
-      - run: apk add --no-cache tectonic nodejs biber
+      - run: apk add --no-cache nodejs nix
       - name: Checkout code
         uses: actions/checkout@v4
-      - run: tectonic Main.tex
+      - run: nix-shell -p biber tectonic --run "tectonic Main.tex"
 
       # - name: Create Release
       #   uses: softprops/action-gh-release@v1