diff --git a/.github/workflows/build_and_publish_to_pypi.yml b/.github/workflows/build_and_publish_to_pypi.yml
index dc4b414f..251def2e 100644
--- a/.github/workflows/build_and_publish_to_pypi.yml
+++ b/.github/workflows/build_and_publish_to_pypi.yml
@@ -46,21 +46,6 @@ jobs:
         with:
           python-version: "3.10"
 
-      - name: Install pypa/build
-        run: >-
-          python -m
-          pip install
-          build
-          --user
-
-      - name: Build a source tarball
-        run: >-
-          python -m
-          build
-          --sdist
-          --outdir dist/
-          .
-
       - name: Download Wheels
         uses: actions/download-artifact@v4
         with:
diff --git a/.github/workflows/build_and_publish_to_test_pypi.yml b/.github/workflows/build_and_publish_to_test_pypi.yml
index fcdeef5b..1070c903 100644
--- a/.github/workflows/build_and_publish_to_test_pypi.yml
+++ b/.github/workflows/build_and_publish_to_test_pypi.yml
@@ -46,21 +46,6 @@ jobs:
         with:
           python-version: "3.10"
 
-      - name: Install pypa/build
-        run: >-
-          python -m
-          pip install
-          build
-          --user
-
-      - name: Build a source tarball
-        run: >-
-          python -m
-          build
-          --sdist
-          --outdir dist/
-          .
-
       - name: Download Wheels
         uses: actions/download-artifact@v4
         with: