From 1caddbe2583120ede8b13321d42905ca178719b3 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?J=C3=B6rg=20Thalheim?= <joerg@thalheim.io>
Date: Sun, 1 Dec 2019 17:11:21 +0000
Subject: [PATCH] clang-tools: fix substitution in wrapper

---
 pkgs/development/tools/clang-tools/wrapper | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/pkgs/development/tools/clang-tools/wrapper b/pkgs/development/tools/clang-tools/wrapper
index fe17880b07d8..53c99a67f2d3 100644
--- a/pkgs/development/tools/clang-tools/wrapper
+++ b/pkgs/development/tools/clang-tools/wrapper
@@ -6,7 +6,7 @@ buildcpath() {
     case $1 in
         -isystem)
             shift
-            path=$path${path':'}$1
+            path=$path${path:+':'}$1
     esac
     shift
   done