Build using pip with no special env

.github/workflows/build.yaml

@@ -32,7 +32,7 @@ jobs:
         run: |
           python -m pip install --upgrade pip setuptools
           python -m pip list -v
-          python -m pip install .[yaml,test]
+          python -m pip install --no-build-isolation .[yaml,test]
 
       - name: Run tests
         run: pytest -r a -v