diff --git a/README.md b/README.md
index f99402ad0..7a626e28c 100644
--- a/README.md
+++ b/README.md
@@ -436,9 +436,14 @@ 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 has GTK 4.6 which is not new enough. Ubuntu 23.10
+has GTK 4.12 and 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
 
 ```