diff --git a/docs/manual/release-notes/rl-0.9.md b/docs/manual/release-notes/rl-0.9.md
index 16bc1cf0..8621ad3e 100644
--- a/docs/manual/release-notes/rl-0.9.md
+++ b/docs/manual/release-notes/rl-0.9.md
@@ -1,8 +1,18 @@
 # Release 0.9 {#sec-release-0-9}
 
+## Breaking changes
+
+- Nixpkgs merged a full and incompatible rewrite of vimPlugins.nvim-treesitter.
+  The changes affected how grammars are built and it caused issues when neovim
+  attempted to load languages and could not find files in expected locations.
+
 ## Changelog {#sec-release-0-9-changelog}
 
 [suimong](https://github.com/suimong):
 
 - Fix `vim.tabline.nvimBufferline` where `setupOpts.options.hover` requires
   `vim.opt.mousemoveevent` to be set.
+
+[thamenato](https://github.com/thamenato):
+
+- Attempt to adapt nvim-treesitter to (breaking) Nixpkgs changes