From fd7d99ed283bea260fa5e674ee8200038196fdac Mon Sep 17 00:00:00 2001
From: Nahum Shalman <nshalman@omniti.com>
Date: Mon, 23 May 2016 10:01:59 -0400
Subject: [PATCH] Clarification about 'docker build --build-arg'

See #22860

Signed-off-by: Nahum Shalman <nshalman@omniti.com>
---
 docs/reference/commandline/build.md | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/docs/reference/commandline/build.md b/docs/reference/commandline/build.md
index eb1bb426b7..8ef0628598 100644
--- a/docs/reference/commandline/build.md
+++ b/docs/reference/commandline/build.md
@@ -298,6 +298,9 @@ accessed like regular environment variables in the `RUN` instruction of the
 Dockerfile. Also, these values don't persist in the intermediate or final images
 like `ENV` values do.
 
+Using this flag will not alter the output you see when the `ARG` lines from the
+Dockerfile are echoed during the build process.
+
 For detailed information on using `ARG` and `ENV` instructions, see the
 [Dockerfile reference](../builder.md).