PyCharm is locking .egg file ("[Error 5] Access is denied" when running "python setup.py install" as an external tool). Follow

Hi, I am trying to make some changes in a Python module with Cython code and to see my changes I have to compile the module every time with "python setup.py install". I have the build/compilation process working from an external console, but when I start PyCharm it is completely blocking the .egg file of the module I am trying to work with - I cannot compile it neither from the console, nor using the "external tool" option in PyCharm.

After closing PyCharm everything works again in a console.

The PyCharm project has the conda environment set up as an interpreter and I am using the same environment when compiling the module which might be causing problems here. Tool settings below:

Program: C:\ProgramData\Anaconda3\envs\<env name>\python.exe

Parameters: setup.py install

Working directory: <path to dir where setup.py sits>

Is there any chance to prevent PyCharm from locking this .egg file? It looks like it might be constantly scanning the environment directory for modules/changes or processing the file in some other way.

Thanks for looking into this!

Edit: system details: Win 10 64 bits, PyCharm Professional 2017.2.4, Python 2.7.14