From 9b274e2962d9d133930a4fd03b2691fc4f6f56cd Mon Sep 17 00:00:00 2001
From: John Ericson <John.Ericson@Obsidian.Systems>
Date: Sat, 2 Nov 2019 19:22:36 -0400
Subject: [PATCH] qtbase-setup-hook: `postPhases` may be undefined

My earlier sed missed this because it already had `{..}`.
---
 pkgs/development/libraries/qt-5/hooks/qtbase-setup-hook.sh | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/pkgs/development/libraries/qt-5/hooks/qtbase-setup-hook.sh b/pkgs/development/libraries/qt-5/hooks/qtbase-setup-hook.sh
index 836e154148b..9f2a9f06f1a 100644
--- a/pkgs/development/libraries/qt-5/hooks/qtbase-setup-hook.sh
+++ b/pkgs/development/libraries/qt-5/hooks/qtbase-setup-hook.sh
@@ -62,5 +62,5 @@ postPatchMkspecs() {
     fi
 }
 if [ -z "${dontPatchMkspecs-}" ]; then
-    postPhases="${postPhases}${postPhases:+ }postPatchMkspecs"
+    postPhases="${postPhases-}${postPhases:+ }postPatchMkspecs"
 fi