From 38333b487af107949f9199b4214c44bc141396d4 Mon Sep 17 00:00:00 2001
From: Antoine Grigis <antoine.grigis@cea.fr>
Date: Tue, 17 Oct 2023 12:37:04 +0200
Subject: [PATCH] readthedocs: add build os.

---
 .readthedocs.yml | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/.readthedocs.yml b/.readthedocs.yml
index 103a580..cb3228d 100644
--- a/.readthedocs.yml
+++ b/.readthedocs.yml
@@ -4,6 +4,9 @@
 
 version: 2
 
+build:
+  os: ubuntu-20.04
+
 sphinx:
   builder: html
   configuration: doc/source/conf.py