From 2723d16a0f6032fd105b9d79dba7b8c853bd7ecf Mon Sep 17 00:00:00 2001
From: David McFarland <corngood@gmail.com>
Date: Thu, 12 Dec 2019 10:09:08 -0400
Subject: [PATCH] chicken: fix chicken-4 set -u regression

---
 pkgs/development/compilers/chicken/4/setup-hook.sh | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/pkgs/development/compilers/chicken/4/setup-hook.sh b/pkgs/development/compilers/chicken/4/setup-hook.sh
index b0d9b53b537..661dc08c090 100644
--- a/pkgs/development/compilers/chicken/4/setup-hook.sh
+++ b/pkgs/development/compilers/chicken/4/setup-hook.sh
@@ -1,7 +1,6 @@
 addChickenRepositoryPath() {
     addToSearchPathWithCustomDelimiter : CHICKEN_REPOSITORY_EXTRA "$1/lib/chicken/8/"
-    # addToSearchPathWithCustomDelimiter \; CHICKEN_INCLUDE_PATH "$1/share/"
-    export CHICKEN_INCLUDE_PATH="$1/share;$CHICKEN_INCLUDE_PATH"
+    export CHICKEN_INCLUDE_PATH="$1/share${CHICKEN_INCLUDE_PATH:+;$CHICKEN_INCLUDE_PATH}"
 }
 
 addEnvHooks "$targetOffset" addChickenRepositoryPath