Release 3.21.8 (2026-07-20)

• Based on upstream Nix 2.34.8.

Bug fixes

• Fix libgit2 ll_find_delta leaking worker threads by @edolstra in DeterminateSystems/nix-src#568
• Don't report SIGQUIT to Sentry by @edolstra in DeterminateSystems/nix-src#570
• Don't abort if NIX_GET_COMPLETIONS is out of range by @edolstra in DeterminateSystems/nix-src#571

Full Changelog: v3.21.7...v3.21.8