title: Can't install NVIDIA apex on Windows
body: <p>I want to install Nvidia Apex on Windows 10 machine with Python 3.6.8. Im doing the <code>git clone https://github.com/NVIDIA/apex</code>, install requirements then <code>pip install -v --no-cache-dir --global-option=&quot;--cpp_ext&quot; --global-option=&quot;--cuda_ext&quot; .</code> as being said on their github page. Unfortunately, all the times among other logs i get the error:</p>
  <pre><code>Cleaning up...
  Removing source in C:\Users\popie\AppData\Local\Temp\pip-req-build-okoz8ok5
  Removed build tracker 'C:\\Users\\popie\\AppData\\Local\\Temp\\pip-req-tracker-35lh6btm'
  Command &quot;&quot;c:\program files\python36\python.exe&quot; -u -c &quot;import setuptools,tokenize;__file__='C:\\Users\\popie\\AppData\\Local\\Temp\\pip-req-build-okoz8ok5\\setup.py';f=getattr(tokenize, 'open', open)(__file__);code=f.read().replace('\r\n','\n');f.close();exec(compile(code, __file__, 'exec'))&quot; --cpp_ext --cuda_ext install --record C:\Users\popie\AppData\Local\Temp\pip-record-qmhcg5oq\install-record.txt --single-version-externally-managed --compile --user --prefix=&quot; failed with error code 1 in C:\Users\popie\AppData\Local\Temp\pip-req-build-okoz8ok5\    
  
  Exception information:
  Traceback (most recent call last):
    File &quot;c:\program files\python36\lib\site-packages\pip\_internal\cli\base_command.py&quot;, line 143, in main
      status = self.run(options, args)
    File &quot;c:\program files\python36\lib\site-packages\pip\_internal\commands\install.py&quot;, line 366, in run
      use_user_site=options.use_user_site,
    File &quot;c:\program files\python36\lib\site-packages\pip\_internal\req\__init__.py&quot;, line 49, in install_given_reqs
      **kwargs
    File &quot;c:\program files\python36\lib\site-packages\pip\_internal\req\req_install.py&quot;, line 791, in install
      spinner=spinner,
    File &quot;c:\program files\python36\lib\site-packages\pip\_internal\utils\misc.py&quot;, line 705, in call_subprocess
      % (command_desc, proc.returncode, cwd))
  pip._internal.exceptions.InstallationError: Command &quot;&quot;c:\program files\python36\python.exe&quot; -u -c &quot;import setuptools, tokenize;__file__='C:\\Users\\popie\\AppData\\Local\\Temp\\pip-req-build-okoz8ok5\\setup.py';f=getattr(tokenize, 'open', open)(__file__);code=f.read().replace('\r\n', '\n');f.close();exec(compile(code, __file__, 'exec'))&quot; --cpp_ext --cuda_ext install --record C:\Users\popie\AppData\Local\Temp\pip-record-qmhcg5oq\install-record.txt --single-version-externally-managed --compile --user --prefix=&quot; failed with error code 1 in C:\Users\popie\AppData\Local\Temp\pip-req-build-okoz8ok5\
  
  Config variable 'Py_DEBUG' is unset, Python ABI tag may be incorrect
  
  Config variable 'WITH_PYMALLOC' is unset, Python ABI tag may be incorrect
  </code></pre>
  <p>I've tried fixes from what google told me to do, but none of them works.</p>