can't install local packages in python virtualenv

Question

After the last update for my windows when I try to display the installed packages in python virtualenv by

pip freeze --local

or

pip freeze 

they gave me the same result "all globally installed packages"

Answer 1

Is your virtualenv activated? .\env\Scripts\activate

After activating your virtualenv pip freeze --local > requirements.txt

More can be found here

Answer 2

I update my pip package then it's work fine!