Read the Docs build information Build id: 11272 Project: detectorcharacterization Version: latest Commit: 4e776cc82b19facf6893aa96e4a51468ac244988 Date: 2019-07-11T05:08:35.192880Z State: finished Success: False [rtd-command-info] start-time: 2019-07-11T10:09:40.651000Z, end-time: 2019-07-11T10:09:40.998000Z, duration: 0, exit-code: 1 python3 -mvirtualenv --no-site-packages --no-download /user_builds/detectorcharacterization/envs/latest Traceback (most recent call last): File "/usr/lib/python3.4/runpy.py", line 170, in _run_module_as_main "__main__", mod_spec) File "/usr/lib/python3.4/runpy.py", line 85, in _run_code exec(code, run_globals) File "/usr/local/lib/python3.4/dist-packages/virtualenv.py", line 2328, in main() File "/usr/local/lib/python3.4/dist-packages/virtualenv.py", line 713, in main symlink=options.symlink) File "/usr/local/lib/python3.4/dist-packages/virtualenv.py", line 925, in create_environment site_packages=site_packages, clear=clear, symlink=symlink)) File "/usr/local/lib/python3.4/dist-packages/virtualenv.py", line 1370, in install_python os.symlink(py_executable_base, full_pth) FileExistsError: [Errno 17] File exists: 'python3' -> '/user_builds/detectorcharacterization/envs/latest/bin/python' Using base prefix '/usr' New python executable in /user_builds/detectorcharacterization/envs/latest/bin/python3 Not overwriting existing python script /user_builds/detectorcharacterization/envs/latest/bin/python (you must use /user_builds/detectorcharacterization/envs/latest/bin/python3)