Hello all! I upgraded my cabal-install from a dev snapshot of 1.24 to the release (currently using ghc 8.0 rc4) One change I'm trying to track down is that my standard editor tooling (sublime Haskell ) now hangs when there's non empty output in stderr (, which it would typically parse and present error highlighting with ), and curiously, when I patched sublime Haskell to use new-build the sublime Haskell tooling worked like a charm. I'm hard pressed to understand why there's a difference, and I don't seen any commits on the cabal packages that should impact this (though to be fair my earlier rc build of cabal 1.24 was using ghc 7.10.3, but that doesn't explain why new-build seems to work fine for me ) I've also reported a bug with sublime Haskell, but any upstream wisdom or ideas would be appreciated