diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 05b893c82af..0a14f865731 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -45,7 +45,8 @@ jobs:
       fail-fast: false  # If one platform fails, allow the rest to keep testing.
       matrix:
         rust: [stable]
-        python-version: [3.6, 3.7, 3.8, 3.9, 3.10-dev, pypy-3.6]
+        # python-version: [3.6, 3.7, 3.8, 3.9, 3.10-dev, pypy-3.6]
+        python-version: [pypy-3.6]
         platform: [
           { os: "macOS-latest",   python-architecture: "x64", rust-target: "x86_64-apple-darwin" },
           { os: "ubuntu-latest", python-architecture: "x64", rust-target: "x86_64-unknown-linux-gnu" },
@@ -110,6 +111,13 @@ jobs:
           python -m pip install -U pip setuptools
           pip install setuptools-rust pytest pytest-benchmark tox tox-venv
 
+      - name: Build example extension modules
+        shell: bash
+        run: |
+          for example_dir in examples/*; do
+              cargo build --manifest-path $example_dir/Cargo.toml
+          done
+
       - name: Test example extension modules
         shell: bash
         run: |
diff --git a/examples/maturin_extension/pyproject.toml b/examples/maturin_extension/pyproject.toml
index 02c1dbc44bb..a44ffa12992 100644
--- a/examples/maturin_extension/pyproject.toml
+++ b/examples/maturin_extension/pyproject.toml
@@ -1,3 +1,4 @@
 [build-system]
-requires = ["maturin @ git+https://github.com/davidhewitt/maturin.git@7a3237299e6bb617f8d4b0957ce205da0f0770d4"]
+# requires = ["maturin @ git+https://github.com/davidhewitt/maturin.git@7a3237299e6bb617f8d4b0957ce205da0f0770d4"]
+requires = ["maturin @ git+https://github.com/davidhewitt/maturin.git@25891771747903276c24e9995c2a8268b84fda8e"]
 build-backend = "maturin"