diff --git a/.github/workflows/publish-twine.yaml b/.github/workflows/publish-twine.yaml
index 057e831..29bed47 100644
--- a/.github/workflows/publish-twine.yaml
+++ b/.github/workflows/publish-twine.yaml
@@ -47,6 +47,7 @@ jobs:
         pip install setuptools "cython >= 0.28"
     - name: Build sdist
       run: |
+        python setup.py build
         python setup.py sdist
     - uses: actions/upload-artifact@v2
       with: