From ed50bd5192e620edb6fc1895c1176244daa4e31c Mon Sep 17 00:00:00 2001
From: Giovanni Tirloni <gpt@gtirloni.com>
Date: Mon, 19 Dec 2016 13:54:54 -0200
Subject: [PATCH] Add comment about TMPDIR environment variable

---
 website/source/docs/other/environmental-variables.html.md | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/website/source/docs/other/environmental-variables.html.md b/website/source/docs/other/environmental-variables.html.md
index fdc6d9dea..a17000688 100644
--- a/website/source/docs/other/environmental-variables.html.md
+++ b/website/source/docs/other/environmental-variables.html.md
@@ -39,3 +39,8 @@ each can be found below:
     [checkpoint.hashicorp.com](https://checkpoint.hashicorp.com/) to look for
     new versions of Packer. If you want to disable this for security or privacy
     reasons, you can set this environment variable to `1`.
+
+-   `TMPDIR` - The location of the directory used for temporary files (defaults
+    to /tmp on Linux/Unix). It might be necessary to customize it when working
+    with large files since /tmp is a memory-backed filesystem in some Linux
+    distributions in which case /var/tmp might be preferred.