From 5dd19938ed7342eb5c54fe4e5037592f61cbe3e3 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Rapha=C3=ABl=20Doursenaud?= <rdoursenaud@free.fr>
Date: Wed, 8 Sep 2021 23:48:50 +0200
Subject: [PATCH] Add required python packages to building docs

Build fails almost silently without them.
Syncs with instructions at https://learn.adafruit.com/building-circuitpython/build-circuitpython
---
 BUILDING.md | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/BUILDING.md b/BUILDING.md
index 256996807d..0686df3c04 100644
--- a/BUILDING.md
+++ b/BUILDING.md
@@ -28,6 +28,12 @@ This project has a bunch of git submodules.  You will need to update them regula
     git submodule sync
     git submodule update --init
 
+### Required Python Packages
+
+Failing to install these will prevent from properly building.
+
+    pip3 install -r requirements-dev.txt
+
 ### mpy-cross
 
 As part of the build process, mpy-cross is needed to compile .py files into .mpy files.