Read the Docs build information Build id: 10426 Project: beckhoff-monitor Version: latest Commit: 1380af49a2eb15a9ba515726be7ddf5df907a106 Date: 2019-05-16T04:55:44.801485Z State: finished Success: False [rtd-command-info] start-time: 2019-05-16T09:55:47.790000Z, end-time: 2019-05-16T09:55:47.954000Z, duration: 0, exit-code: 1 python -mvirtualenv --no-site-packages --no-download /user_builds/beckhoff-monitor/envs/latest New python executable in /user_builds/beckhoff-monitor/envs/latest/bin/python Traceback (most recent call last): File "/usr/local/lib/python2.7/runpy.py", line 174, in _run_module_as_main "__main__", fname, loader, pkg_name) File "/usr/local/lib/python2.7/runpy.py", line 72, in _run_code exec code in run_globals File "/usr/local/lib/python2.7/site-packages/virtualenv.py", line 2316, in main() File "/usr/local/lib/python2.7/site-packages/virtualenv.py", line 708, in main symlink=options.symlink) File "/usr/local/lib/python2.7/site-packages/virtualenv.py", line 921, in create_environment site_packages=site_packages, clear=clear, symlink=symlink)) File "/usr/local/lib/python2.7/site-packages/virtualenv.py", line 1214, in install_python shutil.copyfile(executable, py_executable) File "/usr/local/lib/python2.7/shutil.py", line 83, in copyfile with open(dst, 'wb') as fdst: IOError: [Errno 26] Text file busy: '/user_builds/beckhoff-monitor/envs/latest/bin/python'