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14038 :: Nimble 0.24.0 is out

• jmgomez (orginal) [2026-07-10T18:32:25+02:00] view original

  Nimble 0.24.0 is out

  We're happy to announce Nimble 0.24.0.

  This release marks a big step on the road to Nimble 1.0. The new declarative parser and SAT-based dependency solver that shipped experimentally in previous releases are now the default and only code path.

  There's still plenty ahead before 1.0, including PubGrub-style error reporting for clearer resolution failures, nimble fetch, and more. On top of that, 0.24.0 brings a Chronos-based async engine, parallel version discovery and downloads, a much-improved nimble develop workflow, and a long list of bug fixes.

  To update, run:

  
  nimble install nimble
  Run

  Or download the prebuilt binary for your platform from the GitHub releases page and replace your existing Nimble binary.

  Highlights

  The new engine is now the default

  For several releases, the declarative parser and SAT solver lived behind the --parser, --solver, and --legacy flags while we hardened them.

  Those flags are now gone. There is a single, predictable resolution path. We also removed legacy Babel support and the transitional "vnext" implementation, making the codebase simpler and easier to maintain.

  There's still more work ahead before 1.0, including PubGrub-style error reporting, nimble fetch, and other roadmap items.

  Async, parallel, and faster

  • Package version discovery is now asynchronous and parallel by default. If needed, you can still use the old behavior with --discovery:sync.
  • Downloads now run in parallel.
  • Nim bootstrap resolution and directory copies during version discovery are now lazy, avoiding unnecessary upfront work.

  Together, these changes make cold installs and project setup noticeably faster, especially for projects with large dependency trees.

  Smarter dependency resolution

  • New experimental --resolver:min|max flag to choose the lowest or highest compatible dependency version.
  • SemVer pre-release ordering and parsing are now supported.
  • Several caching correctness fixes.

  A much better nimble develop

  nimble develop received the most attention this release:

  • develop --with-dependencies now recursively vendors dependencies, stores them under their canonical names, and even vendors Nim itself when pinned in the lock file.
  • nimble develop <pkg> now works outside a project directory, preparing an environment to work on a package and its dependencies. It's basically git clone + nimble develop in one command (for example, nimble develop chronos).
  • Running nimble develop with no arguments now sets up all dependencies.
  • The -g / --global develop flag and the global develop file have been removed in favor of the clearer per-project and free-develop model.
  • Fixed all currently tracked nimble develop issues.
  • More robust Nim installation and continued improvements to managing global Nim versions.
  • Lots of additional bug fixes.

  Full release notes: https://github.com/nim-lang/nimble/releases/tag/v0.24.0

  We extend our gratitude to the Nim team for their hard work, the community for their feedback, all contributors for their contributions, and especially Status for sponsoring the development.

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• Araq (orginal) [2026-07-10T18:48:40+02:00] view original

  Not that it is particularly important but this one should be version 1.0 and when you rewrite the core dependency resolution via PubGrub make it version 2.0, or 1.2.

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• jmgomez (orginal) [2026-07-10T18:58:03+02:00] view original

  The plan is not to remove SAT but to do a PubGrub pass when we cant solve so we have proper error messages

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