diff --git a/.github/workflows/cibuildwheel.yml b/.github/workflows/cibuildwheel.yml
index cfe46af5b..670ab0b1a 100644
--- a/.github/workflows/cibuildwheel.yml
+++ b/.github/workflows/cibuildwheel.yml
@@ -52,8 +52,9 @@ jobs:
       - uses: actions/checkout@v4
 
       - name: Build sdist
-        run: |
-          python setup.py sdist
+        run: >
+          pip install cython numpy
+          && python setup.py sdist
       - uses: actions/upload-artifact@v3
         with:
           path: dist/*.tar.gz