diff --git a/source/recipes/devshell/env-var/main.adoc0 b/source/recipes/devshell/env-var/main.adoc0
index 1b8073b..456445d 100644
--- a/source/recipes/devshell/env-var/main.adoc0
+++ b/source/recipes/devshell/env-var/main.adoc0
@@ -25,6 +25,7 @@ $ echo "FOO=${FOO}"
 $# ../../../../../start-shell nix develop <<EOL
 $ echo "FOO=${FOO}"
 $ env
+$ echo $FOO
 $# EOL
 ....