cc-wrapper, clang: `libstdcxxHook` should a propagated build input

Lumping it in with the target platform libraries was incorrect, and
caused eval failures when gcc couldn't be built for the target platform.

1 files changed, 3 insertions, 1 deletions

diff --git a/pkgs/development/compilers/llvm/6/default.nix b/pkgs/development/compilers/llvm/6/default.nix
index 85bb00d80c7..ba704f972c3 100644
--- a/pkgs/development/compilers/llvm/6/default.nix
+++ b/pkgs/development/compilers/llvm/6/default.nix
@@ -50,8 +50,10 @@ let
 
     libstdcxxClang = wrapCCWith rec {
       cc = tools.clang-unwrapped;
-      extraPackages = [
+      extraTools = [
         libstdcxxHook
+      ];
+      extraPackages = [
         targetLlvmLibraries.compiler-rt
       ];
       extraBuildCommands = mkExtraBuildCommands cc;