diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index aa43177..0e31e16 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -221,6 +221,9 @@ jobs:
         with:
           python-version: '3.8'
 
+      - name: Install pypa/build
+        run: pip3 install build
+
       - name: Build sdist
         run: |
           python3 -m build --sdist