Guix

Nix is a tool that takes a unique approach to package management and system configuration. Learn how to make reproducible, declarative, and reliable systems. Nix builds packages in isolation from each other. This ensures that they are reproducible and don't have undeclared dependencies, so if a package works on one machine, it will also work on another. Nix makes it trivial to share development and build environments for your projects, regardless of what programming languages and tools you’re using. Nix ensures that installing or upgrading one package cannot break other packages. It allows you to roll back to previous versions and ensures that no package is in an inconsistent state during an upgrade. Nix is a purely functional package manager. This means that it treats packages like values in purely functional programming languages such as Haskell, they are built by functions that don’t have side effects, and they never change after they have been built.

You install it once and enjoy it forever. No longer do you have to worry every six months about massive system upgrades that risk bricking your system. You get frequent updates that not only address vulnerabilities or squash bugs, but reflect latest features and developments, such as fresh kernels, fresh drivers and recent desktop environment versions. Updates are thoroughly tested against industry-grade quality standards, taking advantage of a build service other Linux distributions envy us. Not only is each new version of a package individually tested, but different clusters of versions are are tested against each other, making sure your system is internally consistent. With a single command you can update thousands of packages, rollback to last week’s snapshot, fast-forward again, and even preview upcoming releases.