diff --git a/development/lighttable/README b/development/lighttable/README
index 1c9f0b3f6b..99a4b39a95 100644
--- a/development/lighttable/README
+++ b/development/lighttable/README
@@ -4,3 +4,7 @@ programs and embed anything from websites to games.
 It provides the real time feedback we need to not only answer
 questions about our code, but to understand how our programs
 really work.
+
+Warning: This SlackBuild requires network access when it runs, meaning
+it downloads files from the Internet with root access. You should
+decide for yourself whether or not you think this is a good idea.