[Haskell-cafe] caching ~/.cabal with github actions on windows

[Ben Franksen]

I can't get this to work. It works perfectly fine on Linux and MacOS but
on Windows cabal always re-builds all the dependencies. The cache
post-action on Windows tells me that the cache hasn't changed, which
means cabal actually re-created the ~/.cabal directory exactly as it was
in the cache!

Is this a known bug in cabal on Windows?

Does anyone have a work-around?

Cheers
Ben