install-qt-action: Project ERROR: Cannot run compiler 'cl'. Output:

I have a really hard time getting this running on Windows. Let me first say that I’m not really knowing what I’m doing, C++ is not my comfort zone and Qt even less. I’m just trying to get this running on Windows too and hope you can maybe help. https://github.com/Vampire/svn2git/runs/879715535 works fine with the setup on Linux. Now I try to get it running on Windows. But here is the problem: https://github.com/Vampire/svn2git/runs/879875430 Qt is installed fine, but when trying to run qmake the error from the title is raised and I’m kind of lost. 😕