From 5bfa6237e8eaacad41ed9004dda86f4b1651afb4 Mon Sep 17 00:00:00 2001
From: Max Parzen <max.parzen@ed.ac.uk>
Date: Sun, 7 May 2023 15:44:33 +0100
Subject: [PATCH] add graphviz

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

diff --git a/.readthedocs.yml b/.readthedocs.yml
index 35eff5de..b5dc5eba 100644
--- a/.readthedocs.yml
+++ b/.readthedocs.yml
@@ -8,8 +8,11 @@ build:
   os: ubuntu-22.04
   tools:
     python: "3.11"
+  apt_packages:
+    - graphviz
 
 python:
   install:
   - requirements: doc/requirements.txt
   system_packages: false
+  apt_packages: