pip packages

.github/workflows/ci.yml

@@ -32,8 +32,7 @@ jobs:
 
       - name: Verify docs
         run: |
-          export PIP_BREAK_SYSTEM_PACKAGES=1
-          pip install sphinx sphinx_rtd_theme
+          pip install -U sphinx sphinx_rtd_theme sphinxcontrib-htmlhelp sphinxcontrib-serializinghtml
           cd docs && python3 -m pip install -r requirements.txt && cd -
           make clean-docs docs
           git diff --exit-code