Read the Docs build information Build id: 21224 Project: ptc Version: latest Commit: 12d038e446603cbd452cf336bee791d089baac1a Date: 2021-01-18T12:24:40.409674Z State: finished Success: False [rtd-command-info] start-time: 2021-01-18T18:24:45.809000Z, end-time: 2021-01-18T18:24:58.766000Z, duration: 12, exit-code: 0 python3 -mvirtualenv --no-site-packages --no-download /user_builds/ptc/envs/latest Using base prefix '/usr' New python executable in /user_builds/ptc/envs/latest/bin/python3 Not overwriting existing python script /user_builds/ptc/envs/latest/bin/python (you must use /user_builds/ptc/envs/latest/bin/python3) Installing setuptools, pip, wheel...done. [rtd-command-info] start-time: 2021-01-18T18:24:58.828000Z, end-time: 2021-01-18T18:25:06.303000Z, duration: 7, exit-code: 1 python /user_builds/ptc/envs/latest/bin/pip install --use-wheel -U --cache-dir /user_builds/ptc/.cache/pip sphinx==1.3.5 Pygments==2.1.3 setuptools==20.1.1 docutils==0.12 mkdocs==0.15.0 mock==1.0.1 pillow==2.6.1 git+https://github.com/rtfd/readthedocs-sphinx-ext.git@0.6-alpha#egg=readthedocs-sphinx-ext sphinx-rtd-theme==0.1.9 alabaster>=0.7,<0.8,!=0.7.5 commonmark==0.5.4 recommonmark==0.1.1 Requirement already up-to-date: sphinx==1.3.5 in /user_builds/ptc/envs/latest/lib/python3.4/site-packages Requirement already up-to-date: Pygments==2.1.3 in /user_builds/ptc/envs/latest/lib/python3.4/site-packages Collecting setuptools==20.1.1 Using cached https://files.pythonhosted.org/packages/e8/82/3b5455f74bf9ac0757d09c625b7741e6fc284d7519cffc3babb6c5173cf5/setuptools-20.1.1-py2.py3-none-any.whl Requirement already up-to-date: docutils==0.12 in /user_builds/ptc/envs/latest/lib/python3.4/site-packages Requirement already up-to-date: mkdocs==0.15.0 in /user_builds/ptc/envs/latest/lib/python3.4/site-packages Requirement already up-to-date: mock==1.0.1 in /user_builds/ptc/envs/latest/lib/python3.4/site-packages Requirement already up-to-date: pillow==2.6.1 in /user_builds/ptc/envs/latest/lib/python3.4/site-packages Collecting readthedocs-sphinx-ext from git+https://github.com/rtfd/readthedocs-sphinx-ext.git@0.6-alpha#egg=readthedocs-sphinx-ext Cloning https://github.com/rtfd/readthedocs-sphinx-ext.git (to 0.6-alpha) to /tmp/pip-build-lbc80qjt/readthedocs-sphinx-ext Could not find a tag or branch '0.6-alpha', assuming commit. error: pathspec '0.6-alpha' did not match any file(s) known to git. Command "git checkout -q 0.6-alpha" failed with error code 1 in /tmp/pip-build-lbc80qjt/readthedocs-sphinx-ext You are using pip version 9.0.1, however version 20.3.3 is available. You should consider upgrading via the 'pip install --upgrade pip' command.