From 908b143e510a0d6275d1960334e488173241251c Mon Sep 17 00:00:00 2001
From: John Ericson <John.Ericson@Obsidian.Systems>
Date: Thu, 7 Nov 2019 16:31:55 -0500
Subject: [PATCH] gstreamer: GST_PLUGIN_SYSTEM_PATH.* may be undefined

---
 pkgs/development/libraries/gstreamer/core/setup-hook.sh         | 2 +-
 .../libraries/gstreamer/legacy/gstreamer/setup-hook.sh          | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/pkgs/development/libraries/gstreamer/core/setup-hook.sh b/pkgs/development/libraries/gstreamer/core/setup-hook.sh
index b8c741af578..026a4e5f55a 100644
--- a/pkgs/development/libraries/gstreamer/core/setup-hook.sh
+++ b/pkgs/development/libraries/gstreamer/core/setup-hook.sh
@@ -1,7 +1,7 @@
 addGstreamer1LibPath () {
     if test -d "$1/lib/gstreamer-1.0"
     then
-        export GST_PLUGIN_SYSTEM_PATH_1_0="${GST_PLUGIN_SYSTEM_PATH_1_0}${GST_PLUGIN_SYSTEM_PATH_1_0:+:}$1/lib/gstreamer-1.0"
+        export GST_PLUGIN_SYSTEM_PATH_1_0="${GST_PLUGIN_SYSTEM_PATH_1_0-}${GST_PLUGIN_SYSTEM_PATH_1_0:+:}$1/lib/gstreamer-1.0"
     fi
 }
 
diff --git a/pkgs/development/libraries/gstreamer/legacy/gstreamer/setup-hook.sh b/pkgs/development/libraries/gstreamer/legacy/gstreamer/setup-hook.sh
index 65ce2611251..636e20b732b 100644
--- a/pkgs/development/libraries/gstreamer/legacy/gstreamer/setup-hook.sh
+++ b/pkgs/development/libraries/gstreamer/legacy/gstreamer/setup-hook.sh
@@ -1,7 +1,7 @@
 addGstreamerLibPath () {
     if test -d "$1/lib/gstreamer-0.10"
     then
-        export GST_PLUGIN_SYSTEM_PATH="${GST_PLUGIN_SYSTEM_PATH}${GST_PLUGIN_SYSTEM_PATH:+:}$1/lib/gstreamer-0.10"
+        export GST_PLUGIN_SYSTEM_PATH="${GST_PLUGIN_SYSTEM_PATH-}${GST_PLUGIN_SYSTEM_PATH:+:}$1/lib/gstreamer-0.10"
     fi
 }