Hi Tamar The current state of a clean Windows build has improved - but still has multiple failures. See below Thanks for your work on this. I can send more details if that'd be helpful Simon Unexpected failures: plugins/plugins07.run plugins07 [bad exit code] (normal) plugins/T10420.run T10420 [bad exit code] (normal) plugins/T10294a.run T10294a [bad exit code] (normal) plugins/T11244.run T11244 [bad stderr] (normal) Framework failures: backpack/cabal/bkpcabal03/bkpcabal03.run bkpcabal03 [runTest] (Unhandled exception: [Errno 90] Directory not empty: 'autogen') plugins/plugins07.run plugins07 [normal] (pre_cmd failed: 2) plugins/T10420.run T10420 [normal] (pre_cmd failed: 2) plugins/T10294a.run T10294a [normal] (pre_cmd failed: 2) plugins/plugins07.run plugins07 [runTest] (Unhandled exception: [Errno 90] Directory not empty: 'rule-defining-plugin-0.1') plugins/T11244.run T11244 [normal] (pre_cmd failed: 2) safeHaskell/check/pkg01/ImpSafeOnly03.run ImpSafeOnly03 [runTest] (Unhandled exception: [Errno 90] Directory not empty: 'safePkg01-1.0-COK8JB4prM8EuKYKd3XaX3')