Merge pull request #6838 from commercialhaskell/ci #4000

Job	Run time
Unit tests (windows-latest)	4m 4s
Unit tests (ubuntu-latest)	2m 12s
Pedantic	4m 59s
Unit tests (macos-latest)	3m 10s
Unit tests (ubuntu-latest, alpine, --docker --system-ghc --no-install-ghc --flag stack:static)	4m 41s
	19m 6s

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