Platform Support

Packages receive varying degrees of support, both in terms of maintainer and security team attention and available computation resources for continuous integration (CI). We have 7 defined tiers denoting how well supported each platform is.

Tiers

Tier 1

Tier 1 platforms receive the highest level of support where problems can block updates, security fixes are treated with urgency, platform-specific patches are freely applied, and most packages are expected to work.

Tier 2

Tier 2 platforms are expected to remain functional and secure with updates, receive platform-specific patches as needed, and have many packages built by Hydra with full ofBorg support.

Tier 3

Tier 3 platforms may receive non-intrusive platform-specific fixes, have native bootstrap tools available with cross-build toolchains in binary cache, but updates might break builds on these platforms.

Tier 4-7

Platform Tiers 4 through 7 indicate varying levels of minimal support going from receiving only limited fixes to platforms with no support, but a path to support.

Breakdown

nixos.org/manual/nixpkgs/stable/using/platform-support.html