default python

Author: graingert

.github/workflows/ci.yaml

@@ -55,12 +55,12 @@ jobs:
         allow-prereleases: true
 
     - name: Test build
-      run: pipx run build .
+      run: pipx run --python=python build .
 
     - name: Install dependencies
       run: |
         openssl version
-        python -m pip install --upgrade twisted coverage
+        python -m pip install --upgrade twisted coverage build
 
     - name: Test
       run: |