From c3ef7065b9f019d1a791f32cf27b631950ccf8c0 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Amy=20de=20Buitl=C3=A9ir?= <amy@nualeargais.ie>
Date: Mon, 10 Dec 2018 01:03:20 +0000
Subject: [PATCH] Explained the declare command, as it may be unfamiliar.

---
 pills/07-working-derivation.xml | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/pills/07-working-derivation.xml b/pills/07-working-derivation.xml
index 4e69877..e40284b 100644
--- a/pills/07-working-derivation.xml
+++ b/pills/07-working-derivation.xml
@@ -65,6 +65,9 @@
 
       <programlisting><xi:include href="./07/builder.sh.txt" parse="text" /></programlisting>
 
+      The command <literal>declare -xp</literal>
+      lists exported variables.
+      (<literal>declare</literal> is a builtin bash function.)
       As we covered in the previous pill, Nix computes the output path of the
       derivation. The resulting <literal>.drv</literal> file contains a list of
       environment variables passed to the builder. One of these is