[Python] How do I get nmake onto my system so pip / cmake can use it for installation

I'm trying to install an obscure scientific python package "pycotools3" on windows 10 in conda using pip (3.6.9 environment). I use it in my research software which runs fine on osx. It's an old package and no longer actively supported. I am required to test my software on Windows. Unfortunately pycotools3 won't install. I think because cmake can't find nmake.

CMake Error at CMakeLists.txt:23 (project):
Running

'nmake' '-?'

failed with:

The system cannot find the file specified


I've tried installing visual studio but this hasn't added nmake to any of the paths. What should i do to get nmake onto the machine and into the anaconda powershell path?

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