From af16ecc8614cdfad66790ff670fbaec371f03c97 Mon Sep 17 00:00:00 2001
From: Harrissou Sant-anna <delazj@gmail.com>
Date: Wed, 29 Jun 2022 06:27:02 +0200
Subject: [PATCH] Be specific on versions that need external QT 3D headers

---
 INSTALL.md | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/INSTALL.md b/INSTALL.md
index 0ec86b05e94..af0025d14a1 100644
--- a/INSTALL.md
+++ b/INSTALL.md
@@ -347,10 +347,11 @@ In the cmake, you need to enable:
 WITH_3D=True
 ```
 
-### 3.8.1. Compiling with 3D on Debian based distributions
+### 3.8.1. Compiling with 3D on Debian Bullseye based distributions
 
 QGIS 3D requires Qt53DExtras. These headers have been removed
-from Qt upstream on Debian based distributions. A copy has been made in the
+from Qt upstream on Debian Bullseye based distributions (including e.g. 
+Ubuntu 20.04). A copy has been made in the
 QGIS repository in `external/qt3dextra-headers`.
 To compile with 3D enabled, you need to add some cmake options: