Windows nightly job fails
Unexpected failures:
haddock/haddock_testsuite/haddockHtmlTest.run haddockHtmlTest [bad exit code (2)] (normal)
haddock/haddock_testsuite/haddockHypsrcTest.run haddockHypsrcTest [bad exit code (2)] (normal)
ghci/T16525b/T16525b.run T16525b [bad stderr] (ghci)
perf/space_leaks/T4029.run T4029 [bad stderr] (ghci)