From c0cf13e52ea9757ded4294521fbe266637006548 Mon Sep 17 00:00:00 2001
From: Clemens Fruhwirth <clemens@endorphin.org>
Date: Mon, 19 Mar 2018 13:18:49 +0100
Subject: [PATCH] Add space for NIX_CXXSTDLIB_COMPILE+=' ...' as
 NIX_CXXSTDLIB_COMPILE might not be empty.

---
 pkgs/development/compilers/gcc/libstdc++-hook.sh | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/pkgs/development/compilers/gcc/libstdc++-hook.sh b/pkgs/development/compilers/gcc/libstdc++-hook.sh
index 2d30c845b5a..893bbbc0c2d 100644
--- a/pkgs/development/compilers/gcc/libstdc++-hook.sh
+++ b/pkgs/development/compilers/gcc/libstdc++-hook.sh
@@ -1,2 +1,2 @@
-export NIX_CXXSTDLIB_COMPILE+="-isystem $(echo -n @gcc@/include/c++/*) -isystem $(echo -n @gcc@/include/c++/*)/$(@gcc@/bin/gcc -dumpmachine)"
+export NIX_CXXSTDLIB_COMPILE+=" -isystem $(echo -n @gcc@/include/c++/*) -isystem $(echo -n @gcc@/include/c++/*)/$(@gcc@/bin/gcc -dumpmachine)"
 export NIX_CXXSTDLIB_LINK=" -stdlib=libstdc++"