Read the Docs build information Build id: 7516 Project: howtomiddlelayer Version: latest Commit: e2524476f884ed00b824d398fd9916cc3d6a0d6b Date: 2018-07-13T05:49:45.476473Z State: finished Success: False [rtd-command-info] start-time: 2018-07-13T10:49:51.510000Z, end-time: 2018-07-13T10:49:51.737000Z, duration: 0, exit-code: 1 python3 -mvirtualenv --system-site-packages --no-download /user_builds/howtomiddlelayer/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 1231, in install_python shutil.copyfile(executable, py_executable) File "/usr/lib/python3.4/shutil.py", line 108, in copyfile with open(dst, 'wb') as fdst: OSError: [Errno 26] Text file busy: '/user_builds/howtomiddlelayer/envs/latest/bin/python3' Using base prefix '/usr' New python executable in /user_builds/howtomiddlelayer/envs/latest/bin/python3