From bb36a1a3cf3fbe6bc9d0afcc5fa0f928bed03170 Mon Sep 17 00:00:00 2001
From: Joel Moberg <joel.moberg@gmail.com>
Date: Thu, 18 Feb 2016 23:25:23 +0100
Subject: Document IN_NIX_SHELL variable

---
 doc/manual/command-ref/env-common.xml | 6 ++++++
 1 file changed, 6 insertions(+)

(limited to 'doc/manual/command-ref')

diff --git a/doc/manual/command-ref/env-common.xml b/doc/manual/command-ref/env-common.xml
index cb1ecfee123e..27efef945f15 100644
--- a/doc/manual/command-ref/env-common.xml
+++ b/doc/manual/command-ref/env-common.xml
@@ -11,6 +11,12 @@
 
 <variablelist xml:id="env-common">
 
+<varlistentry><term><envar>IN_NIX_SHELL</envar></term>
+
+  <listitem><para>Indicator that tells if the current environment was set up by
+  <command>nix-shell</command>.</para></listitem>
+
+</varlistentry>
 
 <varlistentry xml:id="env-NIX_PATH"><term><envar>NIX_PATH</envar></term>
 
-- 
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