Windows CI failure in `Dhall.DirectoryTree`

[sjakobi]

See https://github.com/dhall-lang/dhall-haskell/actions/runs/3138921448/jobs/5098786985#step:5:3517.

This seems related to #2437. Could you possibly take a look, @mmhat?

[mmhat]

I am on it.

[Gabriella439]

Just to clarify: does this only affect Windows?

[mmhat]

@Gabriella439 Yes, Unix systems are fine. The issue is caused by some missing types in the unix-compat package. It should ultimately be solved there and what I am trying here is to find a decent workaround.

[mmhat]

Also setting permissions does not work as expected on Windows: https://github.com/mmhat/dhall-haskell/actions/runs/3147765869/jobs/5117585580
I will disable setting permissions on Windows for now.