2.2.1: sphinx warnings `reference target not found`

[kloczek]

On building my packages I'm using sphinx-build command with -n switch which shows warmings about missing references. These are not critical issues.
Here is the output with warnings:

+ /usr/bin/sphinx-build -n -T -b man docs build/sphinx/man
Running Sphinx v4.5.0
making output directory... done
WARNING: html_static_path entry '_static' does not exist
building [mo]: targets for 0 po files that are out of date
building [man]: all manpages
updating environment: [new config] 2 added, 0 changed, 0 removed
reading sources... [100%] index
WARNING: autodoc: failed to import module 'cleanup' from module 'pytest_services'; the following exception was raised:
No module named 'pytest_services.cleanup'
WARNING: autodoc: failed to import module 'django_settings' from module 'pytest_services'; the following exception was raised:
No module named 'django'
/home/tkloczko/rpmbuild/BUILD/pytest-services-2.2.1/pytest_services/plugin.py:docstring of pytest_services.plugin:1: WARNING: duplicate object description of pytest_services.plugin, other instance in api/index, use :noindex: for one of them
/home/tkloczko/rpmbuild/BUILD/pytest-services-2.2.1/pytest_services/plugin.py:docstring of pytest_services.plugin.pytest_addoption:1: WARNING: duplicate object description of pytest_services.plugin.pytest_addoption, other instance in api/index, use :noindex: for one of them
/home/tkloczko/rpmbuild/BUILD/pytest-services-2.2.1/pytest_services/plugin.py:docstring of pytest_services.plugin.random:1: WARNING: duplicate object description of pytest_services.plugin.random, other instance in api/index, use :noindex: for one of them
/home/tkloczko/rpmbuild/BUILD/pytest-services-2.2.1/pytest_services/memcached.py:docstring of pytest_services.memcached:1: WARNING: duplicate object description of pytest_services.memcached, other instance in api/index, use :noindex: for one of them
/home/tkloczko/rpmbuild/BUILD/pytest-services-2.2.1/pytest_services/memcached.py:docstring of pytest_services.memcached.do_memcached_clean:1: WARNING: duplicate object description of pytest_services.memcached.do_memcached_clean, other instance in api/index, use :noindex: for one of them
/home/tkloczko/rpmbuild/BUILD/pytest-services-2.2.1/pytest_services/memcached.py:docstring of pytest_services.memcached.memcached:1: WARNING: duplicate object description of pytest_services.memcached.memcached, other instance in api/index, use :noindex: for one of them
/home/tkloczko/rpmbuild/BUILD/pytest-services-2.2.1/pytest_services/memcached.py:docstring of pytest_services.memcached.memcached_clean:1: WARNING: duplicate object description of pytest_services.memcached.memcached_clean, other instance in api/index, use :noindex: for one of them
/home/tkloczko/rpmbuild/BUILD/pytest-services-2.2.1/pytest_services/memcached.py:docstring of pytest_services.memcached.memcached_client:1: WARNING: duplicate object description of pytest_services.memcached.memcached_client, other instance in api/index, use :noindex: for one of them
/home/tkloczko/rpmbuild/BUILD/pytest-services-2.2.1/pytest_services/memcached.py:docstring of pytest_services.memcached.memcached_connection:1: WARNING: duplicate object description of pytest_services.memcached.memcached_connection, other instance in api/index, use :noindex: for one of them
/home/tkloczko/rpmbuild/BUILD/pytest-services-2.2.1/pytest_services/memcached.py:docstring of pytest_services.memcached.memcached_socket:1: WARNING: duplicate object description of pytest_services.memcached.memcached_socket, other instance in api/index, use :noindex: for one of them
/home/tkloczko/rpmbuild/BUILD/pytest-services-2.2.1/pytest_services/mysql.py:docstring of pytest_services.mysql:1: WARNING: duplicate object description of pytest_services.mysql, other instance in api/index, use :noindex: for one of them
/home/tkloczko/rpmbuild/BUILD/pytest-services-2.2.1/pytest_services/mysql.py:docstring of pytest_services.mysql.mysql:1: WARNING: duplicate object description of pytest_services.mysql.mysql, other instance in api/index, use :noindex: for one of them
/home/tkloczko/rpmbuild/BUILD/pytest-services-2.2.1/pytest_services/mysql.py:docstring of pytest_services.mysql.mysql_connection:1: WARNING: duplicate object description of pytest_services.mysql.mysql_connection, other instance in api/index, use :noindex: for one of them
/home/tkloczko/rpmbuild/BUILD/pytest-services-2.2.1/pytest_services/mysql.py:docstring of pytest_services.mysql.mysql_data_dir:1: WARNING: duplicate object description of pytest_services.mysql.mysql_data_dir, other instance in api/index, use :noindex: for one of them
/home/tkloczko/rpmbuild/BUILD/pytest-services-2.2.1/pytest_services/mysql.py:docstring of pytest_services.mysql.mysql_database:1: WARNING: duplicate object description of pytest_services.mysql.mysql_database, other instance in api/index, use :noindex: for one of them
/home/tkloczko/rpmbuild/BUILD/pytest-services-2.2.1/pytest_services/mysql.py:docstring of pytest_services.mysql.mysql_database_getter:1: WARNING: duplicate object description of pytest_services.mysql.mysql_database_getter, other instance in api/index, use :noindex: for one of them
/home/tkloczko/rpmbuild/BUILD/pytest-services-2.2.1/pytest_services/mysql.py:docstring of pytest_services.mysql.mysql_database_name:1: WARNING: duplicate object description of pytest_services.mysql.mysql_database_name, other instance in api/index, use :noindex: for one of them
/home/tkloczko/rpmbuild/BUILD/pytest-services-2.2.1/pytest_services/mysql.py:docstring of pytest_services.mysql.mysql_defaults_file:1: WARNING: duplicate object description of pytest_services.mysql.mysql_defaults_file, other instance in api/index, use :noindex: for one of them
/home/tkloczko/rpmbuild/BUILD/pytest-services-2.2.1/pytest_services/mysql.py:docstring of pytest_services.mysql.mysql_pid:1: WARNING: duplicate object description of pytest_services.mysql.mysql_pid, other instance in api/index, use :noindex: for one of them
/home/tkloczko/rpmbuild/BUILD/pytest-services-2.2.1/pytest_services/mysql.py:docstring of pytest_services.mysql.mysql_socket:1: WARNING: duplicate object description of pytest_services.mysql.mysql_socket, other instance in api/index, use :noindex: for one of them
/home/tkloczko/rpmbuild/BUILD/pytest-services-2.2.1/pytest_services/mysql.py:docstring of pytest_services.mysql.mysql_system_database:1: WARNING: duplicate object description of pytest_services.mysql.mysql_system_database, other instance in api/index, use :noindex: for one of them
/home/tkloczko/rpmbuild/BUILD/pytest-services-2.2.1/pytest_services/mysql.py:docstring of pytest_services.mysql.mysql_watcher:1: WARNING: duplicate object description of pytest_services.mysql.mysql_watcher, other instance in api/index, use :noindex: for one of them
/home/tkloczko/rpmbuild/BUILD/pytest-services-2.2.1/pytest_services/xvfb.py:docstring of pytest_services.xvfb:1: WARNING: duplicate object description of pytest_services.xvfb, other instance in api/index, use :noindex: for one of them
/home/tkloczko/rpmbuild/BUILD/pytest-services-2.2.1/pytest_services/xvfb.py:docstring of pytest_services.xvfb.xvfb:1: WARNING: duplicate object description of pytest_services.xvfb.xvfb, other instance in api/index, use :noindex: for one of them
/home/tkloczko/rpmbuild/BUILD/pytest-services-2.2.1/pytest_services/xvfb.py:docstring of pytest_services.xvfb.xvfb_display:1: WARNING: duplicate object description of pytest_services.xvfb.xvfb_display, other instance in api/index, use :noindex: for one of them
/home/tkloczko/rpmbuild/BUILD/pytest-services-2.2.1/pytest_services/xvfb.py:docstring of pytest_services.xvfb.xvfb_resolution:1: WARNING: duplicate object description of pytest_services.xvfb.xvfb_resolution, other instance in api/index, use :noindex: for one of them
/home/tkloczko/rpmbuild/BUILD/pytest-services-2.2.1/pytest_services/xvfb.py:docstring of pytest_services.xvfb.xvfb_supports_listen:1: WARNING: duplicate object description of pytest_services.xvfb.xvfb_supports_listen, other instance in api/index, use :noindex: for one of them
/home/tkloczko/rpmbuild/BUILD/pytest-services-2.2.1/pytest_services/service.py:docstring of pytest_services.service:1: WARNING: duplicate object description of pytest_services.service, other instance in api/index, use :noindex: for one of them
/home/tkloczko/rpmbuild/BUILD/pytest-services-2.2.1/pytest_services/service.py:docstring of pytest_services.service.run_services:1: WARNING: duplicate object description of pytest_services.service.run_services, other instance in api/index, use :noindex: for one of them
/home/tkloczko/rpmbuild/BUILD/pytest-services-2.2.1/pytest_services/service.py:docstring of pytest_services.service.session_id:1: WARNING: duplicate object description of pytest_services.service.session_id, other instance in api/index, use :noindex: for one of them
/home/tkloczko/rpmbuild/BUILD/pytest-services-2.2.1/pytest_services/service.py:docstring of pytest_services.service.watcher_getter:1: WARNING: duplicate object description of pytest_services.service.watcher_getter, other instance in api/index, use :noindex: for one of them
/home/tkloczko/rpmbuild/BUILD/pytest-services-2.2.1/pytest_services/service.py:docstring of pytest_services.service.worker_id:1: WARNING: duplicate object description of pytest_services.service.worker_id, other instance in api/index, use :noindex: for one of them
WARNING: autodoc: failed to import module 'cleanup' from module 'pytest_services'; the following exception was raised:
No module named 'pytest_services.cleanup'
/home/tkloczko/rpmbuild/BUILD/pytest-services-2.2.1/pytest_services/folders.py:docstring of pytest_services.folders:1: WARNING: duplicate object description of pytest_services.folders, other instance in api/index, use :noindex: for one of them
/home/tkloczko/rpmbuild/BUILD/pytest-services-2.2.1/pytest_services/folders.py:docstring of pytest_services.folders.base_dir:1: WARNING: duplicate object description of pytest_services.folders.base_dir, other instance in api/index, use :noindex: for one of them
/home/tkloczko/rpmbuild/BUILD/pytest-services-2.2.1/pytest_services/folders.py:docstring of pytest_services.folders.lock_dir:1: WARNING: duplicate object description of pytest_services.folders.lock_dir, other instance in api/index, use :noindex: for one of them
/home/tkloczko/rpmbuild/BUILD/pytest-services-2.2.1/pytest_services/folders.py:docstring of pytest_services.folders.memory_base_dir:1: WARNING: duplicate object description of pytest_services.folders.memory_base_dir, other instance in api/index, use :noindex: for one of them
/home/tkloczko/rpmbuild/BUILD/pytest-services-2.2.1/pytest_services/folders.py:docstring of pytest_services.folders.memory_root_dir:1: WARNING: duplicate object description of pytest_services.folders.memory_root_dir, other instance in api/index, use :noindex: for one of them
/home/tkloczko/rpmbuild/BUILD/pytest-services-2.2.1/pytest_services/folders.py:docstring of pytest_services.folders.memory_temp_dir:1: WARNING: duplicate object description of pytest_services.folders.memory_temp_dir, other instance in api/index, use :noindex: for one of them
/home/tkloczko/rpmbuild/BUILD/pytest-services-2.2.1/pytest_services/folders.py:docstring of pytest_services.folders.root_dir:1: WARNING: duplicate object description of pytest_services.folders.root_dir, other instance in api/index, use :noindex: for one of them
/home/tkloczko/rpmbuild/BUILD/pytest-services-2.2.1/pytest_services/folders.py:docstring of pytest_services.folders.run_dir:1: WARNING: duplicate object description of pytest_services.folders.run_dir, other instance in api/index, use :noindex: for one of them
/home/tkloczko/rpmbuild/BUILD/pytest-services-2.2.1/pytest_services/folders.py:docstring of pytest_services.folders.temp_dir:1: WARNING: duplicate object description of pytest_services.folders.temp_dir, other instance in api/index, use :noindex: for one of them
/home/tkloczko/rpmbuild/BUILD/pytest-services-2.2.1/pytest_services/locks.py:docstring of pytest_services.locks:1: WARNING: duplicate object description of pytest_services.locks, other instance in api/index, use :noindex: for one of them
/home/tkloczko/rpmbuild/BUILD/pytest-services-2.2.1/pytest_services/locks.py:docstring of pytest_services.locks.display_getter:1: WARNING: duplicate object description of pytest_services.locks.display_getter, other instance in api/index, use :noindex: for one of them
/home/tkloczko/rpmbuild/BUILD/pytest-services-2.2.1/pytest_services/locks.py:docstring of pytest_services.locks.file_lock:1: WARNING: duplicate object description of pytest_services.locks.file_lock, other instance in api/index, use :noindex: for one of them
/home/tkloczko/rpmbuild/BUILD/pytest-services-2.2.1/pytest_services/locks.py:docstring of pytest_services.locks.get_free_display:1: WARNING: duplicate object description of pytest_services.locks.get_free_display, other instance in api/index, use :noindex: for one of them
/home/tkloczko/rpmbuild/BUILD/pytest-services-2.2.1/pytest_services/locks.py:docstring of pytest_services.locks.get_free_port:1: WARNING: duplicate object description of pytest_services.locks.get_free_port, other instance in api/index, use :noindex: for one of them
/home/tkloczko/rpmbuild/BUILD/pytest-services-2.2.1/pytest_services/locks.py:docstring of pytest_services.locks.lock_resource:1: WARNING: duplicate object description of pytest_services.locks.lock_resource, other instance in api/index, use :noindex: for one of them
/home/tkloczko/rpmbuild/BUILD/pytest-services-2.2.1/pytest_services/locks.py:docstring of pytest_services.locks.lock_resource_timeout:1: WARNING: duplicate object description of pytest_services.locks.lock_resource_timeout, other instance in api/index, use :noindex: for one of them
/home/tkloczko/rpmbuild/BUILD/pytest-services-2.2.1/pytest_services/locks.py:docstring of pytest_services.locks.locked_resources:1: WARNING: duplicate object description of pytest_services.locks.locked_resources, other instance in api/index, use :noindex: for one of them
/home/tkloczko/rpmbuild/BUILD/pytest-services-2.2.1/pytest_services/locks.py:docstring of pytest_services.locks.port_getter:1: WARNING: duplicate object description of pytest_services.locks.port_getter, other instance in api/index, use :noindex: for one of them
/home/tkloczko/rpmbuild/BUILD/pytest-services-2.2.1/pytest_services/locks.py:docstring of pytest_services.locks.random:1: WARNING: duplicate object description of pytest_services.locks.random, other instance in api/index, use :noindex: for one of them
/home/tkloczko/rpmbuild/BUILD/pytest-services-2.2.1/pytest_services/locks.py:docstring of pytest_services.locks.unlock_display:1: WARNING: duplicate object description of pytest_services.locks.unlock_display, other instance in api/index, use :noindex: for one of them
/home/tkloczko/rpmbuild/BUILD/pytest-services-2.2.1/pytest_services/locks.py:docstring of pytest_services.locks.unlock_port:1: WARNING: duplicate object description of pytest_services.locks.unlock_port, other instance in api/index, use :noindex: for one of them
/home/tkloczko/rpmbuild/BUILD/pytest-services-2.2.1/pytest_services/locks.py:docstring of pytest_services.locks.unlock_resource:1: WARNING: duplicate object description of pytest_services.locks.unlock_resource, other instance in api/index, use :noindex: for one of them
/home/tkloczko/rpmbuild/BUILD/pytest-services-2.2.1/pytest_services/log.py:docstring of pytest_services.log:1: WARNING: duplicate object description of pytest_services.log, other instance in api/index, use :noindex: for one of them
/home/tkloczko/rpmbuild/BUILD/pytest-services-2.2.1/pytest_services/log.py:docstring of pytest_services.log.dont_capture:1: WARNING: duplicate object description of pytest_services.log.dont_capture, other instance in api/index, use :noindex: for one of them
/home/tkloczko/rpmbuild/BUILD/pytest-services-2.2.1/pytest_services/log.py:docstring of pytest_services.log.remove_handlers:1: WARNING: duplicate object description of pytest_services.log.remove_handlers, other instance in api/index, use :noindex: for one of them
/home/tkloczko/rpmbuild/BUILD/pytest-services-2.2.1/pytest_services/log.py:docstring of pytest_services.log.services_log:1: WARNING: duplicate object description of pytest_services.log.services_log, other instance in api/index, use :noindex: for one of them
/home/tkloczko/rpmbuild/BUILD/pytest-services-2.2.1/pytest_services/log.py:docstring of pytest_services.log.workaround_issue_20:1: WARNING: duplicate object description of pytest_services.log.workaround_issue_20, other instance in api/index, use :noindex: for one of them
WARNING: autodoc: failed to import module 'django_settings' from module 'pytest_services'; the following exception was raised:
No module named 'django'
looking for now-outdated files... none found
pickling environment... done
checking consistency... done
writing... python-pytest-services.3 { } /home/tkloczko/rpmbuild/BUILD/pytest-services-2.2.1/pytest_services/plugin.py:docstring of pytest_services.plugin.random:: WARNING: py:class reference target not found: x in the interval [0, 1).
/home/tkloczko/rpmbuild/BUILD/pytest-services-2.2.1/pytest_services/locks.py:docstring of pytest_services.locks.file_lock:5: WARNING: py:class reference target not found: zc.lockfile.LockError
/home/tkloczko/rpmbuild/BUILD/pytest-services-2.2.1/pytest_services/locks.py:docstring of pytest_services.locks.random:: WARNING: py:class reference target not found: x in the interval [0, 1).
done
build succeeded, 67 warnings.