diff --git a/doc/arch/sandbox.rst b/doc/arch/sandbox.rst
index e577a95..6a1c6fc 100644
--- a/doc/arch/sandbox.rst
+++ b/doc/arch/sandbox.rst
@@ -34,6 +34,16 @@
 Note that standalone/API support is not available at present.
 
 
+Prerequisites
+-------------
+
+Here are some packages that are worth installing if you are doing sandbox or
+tools development in U-Boot:
+
+   python3-pytest lzma lzma-alone lz4 python3 python3-virtualenv
+   libssl1.0-dev
+
+
 Basic Operation
 ---------------