diff --git a/.gitea/workflows/deploy.yml b/.gitea/workflows/deploy.yml
index e2a4174..fa31532 100644
--- a/.gitea/workflows/deploy.yml
+++ b/.gitea/workflows/deploy.yml
@@ -14,7 +14,13 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
+      # fetch-depth: 0 on purpose. The default depth=1 shallow fetch made Gitea
+      # die generating the pack ("fatal: protocol error: bad pack header",
+      # retried three times and failed the run). A full fetch takes the slow
+      # path on the server and works. Don't "optimise" this back to depth=1.
       - uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
 
       - name: Set up Docker Buildx
         uses: docker/setup-buildx-action@v3