Hi, could you please extend the USER_LDFLAGS a little bit, like the following steps?
set USER_LDFLAGS=/LIBPATH:%ANACONDA_ROOT%\envs\pyto\Library\lib /LIBPATH:%MKLProductDir%\mkl\lib\intel64 /LIBPATH:%MKLProductDir%\mkl\lib\intel64\vc14 /LIBPATH:%ANACONDA_ROOT%\Library\lib

If the issue persists, would you please clean the build first?
python setup.py clean