ECM(추가 Cmake 모듈)을 설치하려고 할 때 오류 #2

설치하려고 하는데추가 cmake 모듈소스 코드에서 명령을 실행한 후 오류가 발생합니다 make.

Extension error:
Could not import extension ecm (exception: No module named 'sphinxcontrib')
make[2]: *** [docs/CMakeFiles/documentation.dir/build.make:62: docs/doc_format_html] Error 2
make[2]: Leaving directory '/home/masterpi/Documents/Extra-CMake-Modules/extra-cmake-modules/build'
make[1]: *** [CMakeFiles/Makefile2:217: docs/CMakeFiles/documentation.dir/all] Error 2
make[1]: Leaving directory '/home/masterpi/Documents/Extra-CMake-Modules/extra-cmake-modules/build'
make: *** [Makefile:163: all] Error 2

Sphinx 모듈에 문제가 있는 것 같습니다. 하지만 이를 제거하고 다시 설치해 보았 pip으나 여전히 오류가 발생합니다. 그러면 문제를 해결하려면 어떻게 해야 합니까? 다음은 명령을 실행할 때의 cmake -DCMAKE_INSTALL_PREFIX=/usr ..로그 입니다 make.

$ cmake -DCMAKE_INSTALL_PREFIX=/usr ..
-- WARNING: skipping tests that require PyQt
-- The following features have been enabled:

 * BUILD_HTML_DOCS, Generate HTML documentation for installed modules.
 * BUILD_MAN_DOCS, Generate man page documentation for installed modules.
 * BUILD_TESTING, Build automated tests.

-- The following OPTIONAL packages have been found:

 * Sphinx (required version >= 1.2), Tool to generate documentation., <https://www.sphinx-doc.org/>
   Required to build documentation for Extra CMake Modules.
 * QCollectionGenerator, Qt help collection generator., <https://www.qt.io/>
   Required to build Extra CMake Modules documentation in Qt Help format.
 * Qt5LinguistTools, Qt5 linguist tools., <https://www.qt.io/>
   Required to run tests for the ECMPoQmTools module.
 * Qt5Core, Qt5 core library., <https://www.qt.io/>
   Required to run tests for the ECMQtDeclareLoggingCategory module, and for some tests of the KDEInstallDirs module.
 * Qt5Network (required version >= 5.14.2)
 * Qt5Qml (required version >= 5.14.2)
 * Qt5QmlModels (required version >= 5.14.2)
 * Qt5Gui (required version >= 5.14.2)
 * Qt5Quick, Qt5 Quick library., <https://www.qt.io/>
   Required to run tests for the ECMQMLModules module.

-- The following features have been disabled:

 * BUILD_QTHELP_DOCS, Generate QtHelp documentation for installed modules.

-- Configuring done
-- Generating done
-- Build files have been written to: /home/masterpi/Documents/Extra-CMake-Modules/extra-cmake-modules/build
$ make
make[1]: Entering directory '/home/masterpi/Documents/Extra-CMake-Modules/extra-cmake-modules/build'
make[2]: Entering directory '/home/masterpi/Documents/Extra-CMake-Modules/extra-cmake-modules/build'
make[2]: Leaving directory '/home/masterpi/Documents/Extra-CMake-Modules/extra-cmake-modules/build'
make[2]: Entering directory '/home/masterpi/Documents/Extra-CMake-Modules/extra-cmake-modules/build'
[ 50%] sphinx-build html: see /home/masterpi/Documents/Extra-CMake-Modules/extra-cmake-modules/build/docs/build-html.log
/usr/lib/python3.8/importlib/__init__.py:127: RemovedInSphinx40Warning: The alias 'sphinx.util.pycompat.htmlescape' is deprecated, use 'html.escape' instead. Check CHANGES for Sphinx API modifications.
  return _bootstrap._gcd_import(name[level:], package, level)

Extension error:
Could not import extension ecm (exception: No module named 'sphinxcontrib')
make[2]: *** [docs/CMakeFiles/documentation.dir/build.make:62: docs/doc_format_html] Error 2
make[2]: Leaving directory '/home/masterpi/Documents/Extra-CMake-Modules/extra-cmake-modules/build'
make[1]: *** [CMakeFiles/Makefile2:217: docs/CMakeFiles/documentation.dir/all] Error 2
make[1]: Leaving directory '/home/masterpi/Documents/Extra-CMake-Modules/extra-cmake-modules/build'
make: *** [Makefile:163: all] Error 2