diff --git a/.gitea/workflows/build-and-publish.yaml b/.gitea/workflows/build-and-publish.yaml
index c40b899..19570a0 100644
--- a/.gitea/workflows/build-and-publish.yaml
+++ b/.gitea/workflows/build-and-publish.yaml
@@ -188,11 +188,19 @@ jobs:
           git config user.name "${{ github.actor }}"
           git config user.email "${{ github.actor }}@users.noreply.${REGISTRY}"
           git add pyproject.toml
-          git commit -m "chore(release): v${VERSION}"
 
-          # Push the branch before the tag. If main has moved on and this push
-          # is rejected, the job fails without having left a tag pointing at a
-          # commit that is not on main.
-          git push origin "HEAD:${GITHUB_REF_NAME}"
+          # The file may already carry this version, in which case there is
+          # nothing to commit and `git commit` would fail the job after the
+          # image has already been pushed.
+          if git diff --cached --quiet; then
+            echo "pyproject.toml is already at ${VERSION}"
+          else
+            git commit -m "chore(release): v${VERSION}"
+            # Push the branch before the tag. If main has moved on and this push
+            # is rejected, the job fails without having left a tag pointing at a
+            # commit that is not on main.
+            git push origin "HEAD:${GITHUB_REF_NAME}"
+          fi
+
           git tag -a "v${VERSION}" -m "v${VERSION}"
           git push origin "v${VERSION}"