Release 3.15.1 (2025-12-24)

What's Changed

Users reported the v3.15.0 tarball could not be fetched in a fixed-output derivation due to current stdenv paths present in the documentation. This release eliminated those paths.

PR: DeterminateSystems/nix-src#306

Additionally, this change re-enables CodeRabbit's code review on our changes. CodeRabit was disabled by the upstream project, and we inadvertently included that change.

PR: DeterminateSystems/nix-src#305

Full Changelog: v3.15.0...v3.15.1