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I have created an Python virtualenv with the option --system-site-packages.

But there is one package with an old version installed. The one I want to install is in an newer version with the pip command.

So I change into the virtualenv and try to install the newer version. It downloads the new version, but installed the system wide installed version. What can I do?

(myvirutalenv)username@workpc ~/.virtualenvs/myvirutalenv $ pip install proteus==4.0.* --ignore-installed
Collecting proteus==4.0.*
  Using cached proteus-4.0.2-py2-none-any.whl
Collecting python-dateutil (from proteus==4.0.*)
  Using cached python_dateutil-2.5.3-py2.py3-none-any.whl
Collecting six>=1.5 (from python-dateutil->proteus==4.0.*)
  Using cached six-1.10.0-py2.py3-none-any.whl
Installing collected packages: six, python-dateutil, proteus
Successfully installed proteus-3.2.0 python-dateutil-2.5.3 six-1.10.0
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