# \[ANN\] Dune 3.22 **URL:** \ **Category:** Community\ **Tags:** release, build, dune, announce\ **Created:** [March 20, 2026, 12:19am UTC](https://discuss.ocaml.org/t/ann-dune-3-22/17912 "2026-03-20T00:19:02Z")\ **Posts on this page:** 3\ **Page:** 1
**Author:** ![shonfeder](https://sea2.discourse-cdn.com/flex020/user_avatar/discuss.ocaml.org/shonfeder/32/424_2.png) [@shonfeder](https://discuss.ocaml.org/u/shonfeder)\ **Post date:** [March 20, 2026, 12:19am UTC](https://discuss.ocaml.org/t/ann-dune-3-22/17912/1 "2026-03-20T00:19:02Z")
The Dune team is pleased to announce [the release of dune 3.22.0](https://github.com/ocaml/dune/releases/tag/3.22.0). In addition to many fixes and small improvements, notable highlights of this release include: - Fixes to the dune cache on Windows, thanks to [@Nevor](https://github.com/Nevor) in [ocaml/dune#13713](https://github.com/ocaml/dune/pull/13713). - New tracing functionality, to inspect and diagnose the build processes thanks to [@rgrinberg](https://github.com/rgrinberg) across many PRs. See [the documentation](https://dune.readthedocs.io/en/stable/hacking.html#inspecting-traces-with-jq). - Addition of the `dune-action-trace` library, to instrument trace emission, thanks to [@rgrinberg](https://github.com/rgrinberg). - Support for generating odoc documentation in markdown via the `@doc-markdown` build alias thanks to [@davesnx](https://github.com/davesnx) [ocaml/dune#12581](https://github.com/ocaml/dune/pull/12581). - Full support for OxCaml’s parameterised libraries, thanks to [@art-w](https://github.com/art-w) and [@maiste](https://github.com/maiste). To learn more, see [the docs](https://dune.readthedocs.io/en/stable/tutorials/oxcaml-parameterized-library/index.html). See [the full changelog](https://github.com/ocaml/dune/releases/tag/3.22.0) for all new features and fixes, and for attribution to the contributors who made it all possible. Thank you, contributors! If you encounter a problem with this release, please report it in [our issue tracker](https://github.com/ocaml/dune/issues). ---
**Author:** ![shonfeder](https://sea2.discourse-cdn.com/flex020/user_avatar/discuss.ocaml.org/shonfeder/32/424_2.png) [@shonfeder](https://discuss.ocaml.org/u/shonfeder)\ **Post date:** [April 7, 2026, 2:45am UTC](https://discuss.ocaml.org/t/ann-dune-3-22/17912/2 "2026-04-07T02:45:20Z")
The Dune team is pleased to announce [the release of dune 3.22.1](https://github.com/ocaml/dune/releases/tag/3.22.1). If you encounter a problem with this release, please report it in [our issue tracker](https://github.com/ocaml/dune/issues). ### Fixed - Restore compatibility with Windows 7 (#13905, @nojb) - `dune test` now runs tests in the default context only. When there is a single context, it is treated as the default. This fixes a crash when the workspace has no context named “default”. (#13930, fixes #13904, @Alizter) - Fix `dune trace cat --chrome-trace` to adhere to the Chrome Trace Event Format by providing timestamps and durations at microsecond granularity (#13911, fixes #13906, @Alizter) ---
**Author:** ![shonfeder](https://sea2.discourse-cdn.com/flex020/user_avatar/discuss.ocaml.org/shonfeder/32/424_2.png) [@shonfeder](https://discuss.ocaml.org/u/shonfeder)\ **Post date:** [April 14, 2026, 5:11pm UTC](https://discuss.ocaml.org/t/ann-dune-3-22/17912/3 "2026-04-14T17:11:37Z")
The Dune team is pleased to announce [the release of dune 3.22.2](https://github.com/ocaml/dune/releases/tag/3.22.2). This is a patch release consisting of bug fixes. See [the full changelog](https://github.com/ocaml/dune/releases/tag/3.22.2) for all the changes and for attribution to the contributors who made it all possible. Thank you, contributors! If you encounter a problem with this release, please report it in [our issue ### Fixed - Revert the change in behavior of `--diff-command` back to 3.21. Non-existent files are now passed to this command instead of being replaced with /dev/null ([#14098](https://github.com/ocaml/dune/pull/14098), fixes 13891, [@rgrinberg](https://github.com/rgrinberg))