--- title: Changelog: docs, diagnostics, and resilience improvements description: Determinate Nix 3.6.2 (based on upstream Nix 2.29.0) ships a range of ergonomic and diagnostic improvements. NixOS users can now migrate or upgrade by fetching... canonical: https://daily.dev/posts/changelog-docs-diagnostics-and-resilience-improvements-lbikf2f8d twitter:card: summary_large_image twitter:site: @dailydotdev og:type: website og:site_name: daily.dev og:title: Changelog: docs, diagnostics, and resilience improvements | daily.dev og:description: Determinate Nix 3.6.2 (based on upstream Nix 2.29.0) ships a range of ergonomic and diagnostic improvements. NixOS users can now migrate or upgrade by fetching... og:url: https://daily.dev/posts/changelog-docs-diagnostics-and-resilience-improvements-lbikf2f8d og:image: https://api.daily.dev/og/posts/lBIkF2F8D.png og:image:alt: Changelog: docs, diagnostics, and resilience improvements 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: docs, diagnostics, and resilience improvements **[Determinate Systems](https://daily.dev/sources/determinate-systems)** · 7 min read · 0 upvotes · 0 comments ## Summary Determinate Nix 3.6.2 (based on upstream Nix 2.29.0) ships a range of ergonomic and diagnostic improvements. NixOS users can now migrate or upgrade by fetching from a binary cache instead of building from source. New features include shell auto-completion for determinate-nixd (bash, zsh, fish, elvish, powershell), improved 'inefficient double copy' warnings with source location info, human-readable output for nix profile history replacing set-theory symbols, clearer error messages for --keep-failed with remote builds, better derivation chain diagnostics for wrong-system-type errors, and a new --trace-import-from-derivation flag. Performance improvements include higher concurrency for nix store copy-sigs. NixOS-specific fixes include resolving unauthenticated FlakeHub Cache errors, making nix.settings work again via nix.custom.conf, and adding determinate.enable for fleet-wide migrations. ## Full article daily.dev links to this article rather than hosting it. Read it at the original source: ## Similar posts on daily.dev - [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: 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: faster evaluation and FedRAMP cache keys](https://daily.dev/posts/changelog-faster-evaluation-and-fedramp-cache-keys-qbkpwjrox) · Determinate Systems · 0 upvotes · 0 comments - [OpenTelemetry tracing for Determinate Nix](https://daily.dev/posts/opentelemetry-tracing-for-determinate-nix-epfdixtwp) · Determinate Systems · 0 upvotes · 0 comments --- Tags: [#nixos](https://daily.dev/tags/nixos) [View this post on daily.dev](https://daily.dev/posts/changelog-docs-diagnostics-and-resilience-improvements-lbikf2f8d) ```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: docs, diagnostics, and resilience improvements","url":"https://daily.dev/posts/changelog-docs-diagnostics-and-resilience-improvements-lbikf2f8d","mainEntityOfPage":{"@type":"WebPage","@id":"https://daily.dev/posts/changelog-docs-diagnostics-and-resilience-improvements-lbikf2f8d"},"datePublished":"2026-07-26T07:48:41.400Z","dateModified":"2026-07-26T07:51:33.753Z","description":"Determinate Nix 3.6.2 (based on upstream Nix 2.29.0) ships a range of ergonomic and diagnostic improvements. 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