--- title: Parallel evaluation comes to Determinate Nix | daily.dev description: Determinate Nix 3.11.1 introduces parallel evaluation, cutting evaluation times by 2.5x to 3.7x for commands like nix search, nix flake check, nix flake show,... canonical: https://daily.dev/posts/parallel-evaluation-comes-to-determinate-nix-3keewm1nk twitter:card: summary_large_image twitter:site: @dailydotdev og:type: website og:site_name: daily.dev og:title: Parallel evaluation comes to Determinate Nix | daily.dev og:description: Determinate Nix 3.11.1 introduces parallel evaluation, cutting evaluation times by 2.5x to 3.7x for commands like nix search, nix flake check, nix flake show,... og:url: https://daily.dev/posts/parallel-evaluation-comes-to-determinate-nix-3keewm1nk og:image: https://api.daily.dev/og/posts/3kEEWm1Nk.png og:image:alt: Parallel evaluation comes to Determinate Nix 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. # Parallel evaluation comes to Determinate Nix **[Determinate Systems](https://daily.dev/sources/determinate-systems)** · 3 min read · 0 upvotes · 0 comments ## Summary Determinate Nix 3.11.1 introduces parallel evaluation, cutting evaluation times by 2.5x to 3.7x for commands like nix search, nix flake check, nix flake show, and nix eval --json. A new builtins.parallel primitive lets users explicitly parallelize evaluation within Nix expressions, dramatically improving import-from-derivation (IFD) performance (one example dropped from 50s to 10s). The release also ships a more useful default nix flake init template and fixes build cancellation via Ctrl-C on macOS after a recent OS signal-handling change. ## Full article daily.dev links to this article rather than hosting it. Read it at the original source: --- Tags: [#nixos](https://daily.dev/tags/nixos) [View this post on daily.dev](https://daily.dev/posts/parallel-evaluation-comes-to-determinate-nix-3keewm1nk) ```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":"Parallel evaluation comes to Determinate Nix","url":"https://daily.dev/posts/parallel-evaluation-comes-to-determinate-nix-3keewm1nk","mainEntityOfPage":{"@type":"WebPage","@id":"https://daily.dev/posts/parallel-evaluation-comes-to-determinate-nix-3keewm1nk"},"datePublished":"2026-07-26T07:48:19.854Z","dateModified":"2026-07-26T07:49:31.855Z","description":"Determinate Nix 3.11.1 introduces parallel evaluation, cutting evaluation times by 2.5x to 3.7x for commands like nix search, nix flake check, nix flake show,...","image":"https://media.daily.dev/image/upload/f_auto,q_auto/v1/posts/3c1225b91b553781eff09d7d50a2fd3e?_a=AQAEuop","thumbnailUrl":"https://media.daily.dev/image/upload/f_auto,q_auto/v1/posts/3c1225b91b553781eff09d7d50a2fd3e?_a=AQAEuop","isAccessibleForFree":true,"articleSection":"Determinate Systems","inLanguage":"en","publisher":{"@type":"Organization","name":"daily.dev","url":"https://daily.dev","logo":{"@type":"ImageObject","url":"https://daily.dev/apple-touch-icon.png","width":180,"height":180}},"author":{"@type":"Organization","name":"Determinate Systems","logo":"https://media.daily.dev/image/upload/s--E2qrkc9w--/c_limit,w_256/f_auto,q_auto/v1785052094/logos/determinate-systems?_a=BAMAMicg0","url":"https://daily.dev/sources/determinate-systems"},"commentCount":0,"discussionUrl":"https://daily.dev/posts/parallel-evaluation-comes-to-determinate-nix-3keewm1nk","interactionStatistic":[{"@type":"InteractionCounter","interactionType":{"@type":"LikeAction"},"userInteractionCount":0},{"@type":"InteractionCounter","interactionType":{"@type":"CommentAction"},"userInteractionCount":0}],"keywords":"nixos","timeRequired":"PT3M"} {"@context":"https://schema.org","@type":"BreadcrumbList","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https://daily.dev"},{"@type":"ListItem","position":2,"name":"Determinate Systems","item":"https://daily.dev/sources/determinate-systems"},{"@type":"ListItem","position":3,"name":"Parallel evaluation comes to Determinate Nix"}]} ```