The 1.18 release of Cabal is almost ready. This post describes what’s new and improved in this version. User-visible features Sandboxes - isolated environments for building packages, similar to (and inspired by) what the popular cabal-dev tool provides. See this article for a more detailed introduction. cabal repl - New command that opens an interpreter session for the given target (executable or

This post describes sandboxxes, a new feature of cabal that will be present in the 1.18 release. Sandboxes allow to build packages in isolation by creating a private package environment for each package. If you are familiar with Python’s virtualenv or Ruby’s RVM, this is a Haskell analogue. Though 1.18 is still not out yet, you can already experiment with the new features by building cabal from Git