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-rw-r--r--doc/manual/command-ref/env-common.xml3
1 files changed, 2 insertions, 1 deletions
diff --git a/doc/manual/command-ref/env-common.xml b/doc/manual/command-ref/env-common.xml
index c532ffdde..6a3aaae71 100644
--- a/doc/manual/command-ref/env-common.xml
+++ b/doc/manual/command-ref/env-common.xml
@@ -14,7 +14,8 @@
<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>
+ <command>nix-shell</command>. Since Nix 2.0 the values are
+ <literal>"pure"</literal> and <literal>"impure"</literal></para></listitem>
</varlistentry>