diff --git a/README.md b/README.md
index f99402ad0..a551d96b0 100644
--- a/README.md
+++ b/README.md
@@ -436,9 +436,13 @@ before building it. Typically, these are only gtk4 and libadwaita (unless
 building with `--static=false`). On Ubuntu, use
 
 ```
-$ sudo apt install libgtk-4-dev libadwaita-1-dev
+$ sudo apt install libgtk-4-dev libadwaita-1-dev git
 ```
 
+**Note: a recent GTK is required for ghostty to work with Nvidia (GL) drivers under x11.**
+Ubuntu 22.04 LTS (gtk 4.6) is not new enough.  Ubuntu 23.10 (gtk 4.12) works.
+From [this discussion](https://discourse.gnome.org/t/opengl-context-version-not-respected-on-gtk4-rs/12162?u=cdehais) the problem was fixed in GTK by Dec 2022.
+
 On Arch Linux, use
 
 ```