-tox
-Sphinx
-doc8
-docutils
-setuptools
-six
-sphinxcontrib-httpdomain
-sphinx_bootstrap_theme>=0.4.11
-Jinja2<3.1
+# The order of packages is significant, because pip processes them in the order
+# of appearance. Changing the order has an impact on the overall integration
+# process, which may cause wedges in the gate later.
+sphinx!=1.6.6,!=1.6.7,!=2.1.0,!=3.0.0,!=3.4.2 # BSD
+doc8 # Apache-2.0
+sphinx-material