Failure to install on 64-bit Windows 10 system, and Python version 3.8.10 #92

Collecting rasterio==1.3a3
Using cached rasterio-1.3a3.tar.gz (401 kB)
Installing build dependencies ... done
Getting requirements to build wheel ... error
ERROR: Command errored out with exit status 1:
command: 'C:\Users\xxxx\AppData\Local\Programs\Python\Python38\python.exe' 'C:\Users\xxxx\AppData\Local\Programs\Python\Python38\lib\site-packages\pip_vendor\pep517\in_process_in_process.py' get_requires_for_build_wheel 'C:\Users\xxxx\AppData\Local\Temp\tmprw8grws6'
cwd: C:\Users\xxxx\AppData\Local\Temp\pip-install-ozyk4_bv\rasterio_97d0b87c61a740218c42e09690312378
Complete output (2 lines):
INFO:root:Building on Windows requires extra options to setup.py to locate needed GDAL files. More information is available in the README.
ERROR: A GDAL API version must be specified. Provide a path to gdal-config using a GDAL_CONFIG environment variable or use a GDAL_VERSION environment variable.