RPGOne need help for virtual env

New python executable in /home/ubuntu/virtualenvs/venv-system/bin/python2.7
Also creating executable in /home/ubuntu/virtualenvs/venv-system/bin/python
Installing setuptools, pip, wheel…
Complete output from command /home/ubuntu/virtual…system/bin/python2.7 - setuptools pip wheel:
Traceback (most recent call last):
File “”, line 4, in
File “/opt/circleci/python/2.7.11/lib/python2.7/tempfile.py”, line 32, in
import io as _io
File “/opt/circleci/python/2.7.11/lib/python2.7/io.py”, line 54, in
from _io import (DEFAULT_BUFFER_SIZE, BlockingIOError, UnsupportedOperation,
ImportError: cannot import name DEFAULT_BUFFER_SIZE

…Installing setuptools, pip, wheel…done.
Traceback (most recent call last):
File “/opt/circleci/.pyenv/versions/2.7.11/bin/virtualenv”, line 11, in
sys.exit(main())
File “/opt/circleci/python/2.7.11/lib/python2.7/site-packages/virtualenv.py”, line 713, in main
symlink=options.symlink)
File “/opt/circleci/python/2.7.11/lib/python2.7/site-packages/virtualenv.py”, line 945, in create_environment
download=download,
File “/opt/circleci/python/2.7.11/lib/python2.7/site-packages/virtualenv.py”, line 901, in install_wheel
call_subprocess(cmd, show_stdout=False, extra_env=env, stdin=SCRIPT)
File “/opt/circleci/python/2.7.11/lib/python2.7/site-packages/virtualenv.py”, line 797, in call_subprocess
% (cmd_desc, proc.returncode))
OSError: Command /home/ubuntu/virtual…system/bin/python2.7 - setuptools pip wheel failed with error code 1

((if (directory? “/home/ubuntu/virtualenvs/venv-system”) (echo “Using cached venv”) (do (“virtualenv” “/home/ubuntu/virtualenvs/venv-system” || exit 1) (source “/home/ubuntu/virtualenvs/venv-system/bin/activate” || exit 2) (pip install nose || exit 3))) “true” (echo “source /home/ubuntu/virtualenvs/venv-system/bin/activate” >> “~/.circlerc”)) returned exit code 1

Action failed: virtualenv