title: How to CLONE LOCAL python environment (+ALL packages) into virtualenv?
body: <p>I want to CLONE Python and ALL installed packages into virtual environment using virtualenv.</p>
  
  <p>there are couple of answers here on Stackoverflow (<a href="https://stackoverflow.com/questions/14185288/how-to-create-a-virtualenv-by-cloning-the-current-local-environment">How to create a virtualenv by cloning the current local environment?</a>) - they recommend doing the pip freeze > 1.txt in local environment. And after this in virtual environment pip install -r 1.txt. But this way doesn't work. After running "pip install -r 1.txt" it says that "Requirement already satisfied: asn1crypto==0.22.0 in c:\python34\lib\site-packages" and points to LOCAL packages. So, if I delete or upgrade LOCAL packages they will be changed in VIRTUAL one too.</p>
  
  <p>I also tried to use options --always-copy --system-site-packages. No success. 
  see the printscreen:
  <a href="https://i.stack.imgur.com/V6HFF.jpg" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/V6HFF.jpg" alt="enter image description here"></a></p>
  
  <p>Even after ALL these steps my Virtual env is 17,6 Mb, but local is 290 Mb. I want the virtualenv to be 290 Mb too (or close to it) - an ABSOLUTE copy.</p>
  
  <p>So, the question - how to do a FULL absolute copy of Python and ALL installed packages for the given moment using virtualenv? (OS - Windows)
  Or may be you know some other way - not with virtualenv.</p>
  
  <p>Thanks a lot.</p>