--- title: Changelog: Determinate Nix 3.21.0 | daily.dev description: Determinate Nix 3.21.0 is released, based on upstream Nix 2.34.6. Key additions include support for CNSA 1.0 and 2.0 signing algorithms (including post-quantum... canonical: https://daily.dev/posts/changelog-determinate-nix-3-21-0-ho7teju8v twitter:card: summary_large_image twitter:site: @dailydotdev og:type: website og:site_name: daily.dev og:title: Changelog: Determinate Nix 3.21.0 | daily.dev og:description: Determinate Nix 3.21.0 is released, based on upstream Nix 2.34.6. Key additions include support for CNSA 1.0 and 2.0 signing algorithms (including post-quantum... og:url: https://daily.dev/posts/changelog-determinate-nix-3-21-0-ho7teju8v og:image: https://api.daily.dev/og/posts/HO7TEju8V.png og:image:alt: Changelog: Determinate Nix 3.21.0 og:image:width: 1200 og:image:height: 630 og:locale: en --- > ## Documentation Index > Fetch the complete documentation index at: https://daily.dev/llms.txt > Use this file to discover all available pages before exploring further. # Changelog: Determinate Nix 3.21.0 **[Determinate Systems](https://daily.dev/sources/determinate-systems)** · 3 min read · 0 upvotes · 0 comments ## Summary Determinate Nix 3.21.0 is released, based on upstream Nix 2.34.6. Key additions include support for CNSA 1.0 and 2.0 signing algorithms (including post-quantum ML-DSA schemes) behind an experimental feature flag, a new built-in `nix serve` command for local binary cache testing, a lazily-evaluated `fetchTarball` built-in to avoid unnecessary store copies, and Buildkite authentication support for FlakeHub and FlakeHub Cache via JWTs. The release also includes the usual bug fixes and developer interface improvements. ## Full article daily.dev links to this article rather than hosting it. Read it at the original source: ## Similar posts on daily.dev - [Changelog: Determinate Nix 3.21.7](https://daily.dev/posts/changelog-determinate-nix-3-21-7-spb0ixqhl) · Determinate Systems · 0 upvotes · 0 comments - [Changelog: FlakeHub Cache edge routing and a few crash fixes](https://daily.dev/posts/changelog-flakehub-cache-edge-routing-and-a-few-crash-fixes-umodwxeoj) · Determinate Systems · 0 upvotes · 0 comments - [Changelog: a new upstream base, GC roots for nix eval, and a faster nix copy](https://daily.dev/posts/changelog-a-new-upstream-base-gc-roots-for-nix-eval-and-a-faster-nix-copy-a9ytihpvx) · Determinate Systems · 0 upvotes · 0 comments - [Changelog: faster evaluation and FedRAMP cache keys](https://daily.dev/posts/changelog-faster-evaluation-and-fedramp-cache-keys-qbkpwjrox) · Determinate Systems · 0 upvotes · 0 comments - [Introducing Determinate Secure Packages LTS](https://daily.dev/posts/introducing-determinate-secure-packages-lts-p3regopis) · Determinate Systems · 0 upvotes · 0 comments --- Tags: [#quantum-computing](https://daily.dev/tags/quantum-computing) [View this post on daily.dev](https://daily.dev/posts/changelog-determinate-nix-3-21-0-ho7teju8v) ```json {"@context":"https://schema.org","@graph":[{"@type":"Organization","@id":"https://daily.dev/#organization","name":"daily.dev","url":"https://daily.dev","logo":{"@type":"ImageObject","url":"https://daily.dev/apple-touch-icon.png","width":180,"height":180},"sameAs":["https://twitter.com/dailydotdev","https://github.com/dailydotdev","https://www.linkedin.com/company/daily-dev-ltd"]},{"@type":"WebSite","@id":"https://daily.dev/#website","url":"https://daily.dev","name":"daily.dev","publisher":{"@id":"https://daily.dev/#organization"},"potentialAction":{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https://daily.dev/search?q={search_term_string}"},"query-input":"required name=search_term_string"}}]} {"@context":"https://schema.org","@type":"TechArticle","headline":"Changelog: Determinate Nix 3.21.0","url":"https://daily.dev/posts/changelog-determinate-nix-3-21-0-ho7teju8v","mainEntityOfPage":{"@type":"WebPage","@id":"https://daily.dev/posts/changelog-determinate-nix-3-21-0-ho7teju8v"},"datePublished":"2026-07-26T07:48:22.490Z","dateModified":"2026-07-26T07:49:52.861Z","description":"Determinate Nix 3.21.0 is released, based on upstream Nix 2.34.6. 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