fix docs build.

.readthedocs.yml

@@ -2,15 +2,33 @@
 # Read the Docs configuration file
 # See https://docs.readthedocs.io/en/stable/config-file/v2.html for details
 
+# Some things can only be configured on the RTD dashboard.
+# Those that we may have changed from the default include:
+
+# Analytics code:
+# Show Version Warning: False
+# Single Version: True
+
 # Required
 version: 2
 
 # Build documentation in the docs/ directory with Sphinx
 sphinx:
+  builder: html
   configuration: docs/conf.py
 
+# Set the version of Python and requirements required to build your
+# docs
+
+build:
+  # os is required for some reason
+  os: ubuntu-22.04
+  tools:
+    python: "3.11"
 
-# Optionally set the version of Python and requirements required to build your docs
 python:
   install:
-    - requirements: docs/requirements.txt
+    - method: pip
+      path: .
+      extra_requirements:
+        - docs

docs/conf.py

@@ -165,20 +165,21 @@
 ]
 
 
-
-
-# Example configuration for intersphinx: refer to the Python standard library.
-intersphinx_mapping = {
-    'https://docs.python.org/': None,
-    'https://persistent.readthedocs.io/en/latest': None,
-    'https://pyramid.readthedocs.io/en/latest/': None,
-    'https://zopetraversing.readthedocs.io/en/latest/': None,
-    'https://zopesite.readthedocs.io/en/latest/': None,
-    'https://zopecomponent.readthedocs.io/en/latest/': None,
-    'https://zopeinterface.readthedocs.io/en/latest/': None,
-    'https://zopecontainer.readthedocs.io/en/latest/': None,
+intersphinx_mapping =  {
+    'component': ('https://zopecomponent.readthedocs.io/en/latest/', None),
+    'container': ('https://zopecontainer.readthedocs.io/en/latest/', None,),
+    'i18n': ('https://zopei18nmessageid.readthedocs.io/en/latest/', None),
+    'interface': ('https://zopeinterface.readthedocs.io/en/latest/', None),
+    'persistent': ('https://persistent.readthedocs.io/en/latest', None),
+    'python': ('https://docs.python.org/', None),
+    'schema': ('https://zopeschema.readthedocs.io/en/latest/', None),
+    'site': ('https://zopesite.readthedocs.io/en/latest/', None,),
+    'testing': ('https://ntitesting.readthedocs.io/en/latest/', None),
+    'traversing': ('https://zopetraversing.readthedocs.io/en/latest/', None),
+    'zodb': ('http://www.zodb.org/en/latest/', None),
 }
 
+
 extlinks = {
     'issue': ('https://github.com/NextThought/nti.traversal/issues/%s',
               'issue #'),

setup.py

@@ -65,7 +65,7 @@ def _read(fname):
             'Sphinx >= 2.1',
             'repoze.sphinx.autointerface',
             'sphinx_rtd_theme',
-        ]
+        ] + TESTS_REQUIRE,
     },
     entry_points=entry_points,
     python_requires=">=3.10",