diff --git a/.forgejo/workflows/wheelhouse.yml b/.forgejo/workflows/wheelhouse.yml
index 7684732..717c2e0 100644
--- a/.forgejo/workflows/wheelhouse.yml
+++ b/.forgejo/workflows/wheelhouse.yml
@@ -116,5 +116,22 @@ jobs:
           # secret if you tighten the default token permissions.
           TWINE_PASSWORD: ${{ secrets.WHEELHOUSE_TOKEN || secrets.GITHUB_TOKEN }}
         run: |
-          # --skip-existing keeps re-runs idempotent should a version collide.
-          uvx twine upload --non-interactive --skip-existing dist/*
+          set -euo pipefail
+          # twine's --skip-existing only works for PyPI/TestPyPI, not custom
+          # repositories, so we upload wheel-by-wheel and treat an
+          # "already exists" (HTTP 409) response as a skip to stay idempotent.
+          for whl in dist/*.whl ; do
+            echo "::group::Uploading $(basename "$whl")"
+            if out="$(uvx twine upload --non-interactive --disable-progress-bar "$whl" 2>&1)" ; then
+              echo "$out"
+            else
+              echo "$out"
+              if echo "$out" | grep -qiE "409|already exist|conflict" ; then
+                echo "Version already published, skipping."
+              else
+                echo "::endgroup::"
+                exit 1
+              fi
+            fi
+            echo "::endgroup::"
+          done