Hi, first some background: there is an issue with having Haskell on the next OS X “El Capitan”: [1] caused by security updates in the operating system. The cause is too old `unix` package, the same issue as in [2] Could someone verify that my understanding of the issue is correct, i.e. how Cabal-the-tool and Cabal-the-library interoperate. For me it seems, that one of the easiest ways to fix the issue (for the users), is to have a new release in 7.8 branch, with updated `unix` dependency. Or is it there too might hassle to be possible? Related issues: [3] [4] [1] https://github.com/haskell/cabal/issues/2653 https://github.com/haskell/cabal/issues/2653 [2] https://github.com/haskell/unix/pull/18 https://github.com/haskell/unix/pull/18 [3] https://github.com/commercialhaskell/stack/issues/563 https://github.com/commercialhaskell/stack/issues/563 [4] https://github.com/ghcformacosx/ghc-dot-app/issues/39#issuecomment-122088535 https://github.com/ghcformacosx/ghc-dot-app/issues/39#issuecomment-122088535 Greetings, Oleg P.S. hopefully Windows 10 doesn’t pose similar surprises.