The Cabal developers are happy to announce the first release candidate for cabal-install-3.4.0.0 The corresponding tag are `cabal-install-3.4.0.0-rc2` and `Cabal-3.4.0.0-rc2` https://github.com/haskell/cabal/releases/tag/cabal-install-3.4.0.0-rc2 https://github.com/haskell/cabal/releases/tag/Cabal-3.4.0.0-rc2 and there is a handful of binaries available at https://oleg.fi/cabal-install-3.4.0.0-rc2/ Ubuntu-16.04 bindist should work on most recent Linux distributions, (requires at least kernel 3.15, compiled against glibc-2.23). Similarly darwin-sierra bindist should work on newer macOSes as well. Since the first release candidate (rc1) following issues were resolved: - Bump process version required for job support to 1.6.9 https://github.com/haskell/cabal/issues/6986 - GHC-8.12 is GHC-9.0 https://github.com/haskell/cabal/issues/7019 - cabal-install-head v2-install fails to process source-repository-package https://github.com/haskell/cabal/issues/7007 cabal-install-3.4 release highlights are: - Support for upcoming GHC-9.0 - Removal of sandboxes - Improved public sublibrary support - `active-repositories` configuration - Various `cabal init` improvements - Various `cabal sdist` improvements - `source-repository-package` are not treated as local packages - Added `list-bin` command Complete release notes (drafts) are at: https://github.com/haskell/cabal/tree/master/release-notes Please do test this release and let us know if you encounter any issues: https://github.com/haskell/cabal/issues - Oleg P.S. Unfortunately I discovered yet another bug in cabal sdist behavior, which is triggered if you have packages with data-files. So there will be third release candidate.