--- title: Migrating from sass-rails to Dart Sass | daily.dev description: LibSass reached end-of-life in October 2025, making migration from sass-rails to Dart Sass necessary for Rails projects. Key breaking changes include the... canonical: https://daily.dev/posts/migrating-from-sass-rails-to-dart-sass-vk9xyjlvi twitter:card: summary_large_image twitter:site: @dailydotdev og:type: website og:site_name: daily.dev og:title: Migrating from sass-rails to Dart Sass | daily.dev og:description: LibSass reached end-of-life in October 2025, making migration from sass-rails to Dart Sass necessary for Rails projects. Key breaking changes include the... og:url: https://daily.dev/posts/migrating-from-sass-rails-to-dart-sass-vk9xyjlvi og:image: https://api.daily.dev/og/posts/vK9XYJLvI.png og:image:alt: Migrating from sass-rails to Dart Sass 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. # Migrating from sass-rails to Dart Sass **[RUBYLAND](https://daily.dev/sources/rubyla)** · 6 min read · 0 upvotes · 0 comments ## Summary LibSass reached end-of-life in October 2025, making migration from sass-rails to Dart Sass necessary for Rails projects. Key breaking changes include the deprecated `/` division operator (replaced by `math.div()`), `@import` replaced by `@use` and `@forward` with namespacing, and color/math functions now requiring explicit module imports. The Sass Migrator tool (`sass-migrator module --migrate-deps`) handles most of the conversion automatically. Rails-specific tips include registering extra SCSS entry points in `config/initializers/dartsass.rb`, using `--quiet-deps` to silence third-party warnings, and enabling `--fatal-deprecation` flags to prevent regressions once your own code is clean. ## Full article daily.dev links to this article rather than hosting it. Read it at the original source: ## Similar posts on daily.dev - [Sass: LibSass Has Reached End-Of-Life](https://daily.dev/posts/sass-libsass-has-reached-end-of-life-kuimhb1c2) · Sass · 0 upvotes · 0 comments - [Goodbye SASS](https://daily.dev/posts/goodbye-sass-lf9vddw6q) · Lobsters · 44 upvotes · 5 comments - [Is it Time to Un-Sass?](https://daily.dev/posts/is-it-time-to-un-sass--2nqmqp8in) · CSS-Tricks · 100 upvotes · 16 comments --- Tags: [#css](https://daily.dev/tags/css), [#rails](https://daily.dev/tags/rails) [View this post on daily.dev](https://daily.dev/posts/migrating-from-sass-rails-to-dart-sass-vk9xyjlvi) ```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":"Migrating from sass-rails to Dart Sass","url":"https://daily.dev/posts/migrating-from-sass-rails-to-dart-sass-vk9xyjlvi","mainEntityOfPage":{"@type":"WebPage","@id":"https://daily.dev/posts/migrating-from-sass-rails-to-dart-sass-vk9xyjlvi"},"datePublished":"2026-07-30T19:50:52.708Z","dateModified":"2026-07-30T20:07:15.945Z","description":"LibSass reached end-of-life in October 2025, making migration from sass-rails to Dart Sass necessary for Rails projects. 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