1 files changed, 22 insertions, 7 deletions
diff --git a/pkgs/development/compilers/llvm/3.8/default.nix b/pkgs/development/compilers/llvm/3.8/default.nix
index 04cd9f791e6..453d2c1f04b 100644
--- a/pkgs/development/compilers/llvm/3.8/default.nix
+++ b/pkgs/development/compilers/llvm/3.8/default.nix
@@ -1,4 +1,4 @@
-{ newScope, stdenv, isl, fetchurl, overrideCC, wrapCC, ccWrapperFun }:
+{ newScope, stdenv, libstdcxxHook, isl, fetchurl, overrideCC, wrapCC, ccWrapperFun, darwin }:
 let
   callPackage = newScope (self // { inherit stdenv isl version fetch; });
 
@@ -22,20 +22,35 @@ let
       inherit clang-tools-extra_src stdenv;
     };
 
-    clang = wrapCC self.clang-unwrapped;
+    clang = if stdenv.cc.isGNU then self.libstdcxxClang else self.libcxxClang;
+
+    libstdcxxClang = ccWrapperFun {
+      cc = self.clang-unwrapped;
+      /* FIXME is this right? */
+      inherit (stdenv.cc) libc nativeTools nativeLibc;
+      extraPackages = [ libstdcxxHook ];
+    };
 
     libcxxClang = ccWrapperFun {
       cc = self.clang-unwrapped;
-      isClang = true;
-      inherit (self) stdenv;
       /* FIXME is this right? */
       inherit (stdenv.cc) libc nativeTools nativeLibc;
       extraPackages = [ self.libcxx self.libcxxabi ];
     };
 
-    stdenv = overrideCC stdenv self.clang;
-
-    libcxxStdenv = overrideCC stdenv self.libcxxClang;
+    stdenv = stdenv.override (drv: {
+      allowedRequisites = null;
+      cc = self.clang;
+      # Don't include the libc++ and libc++abi from the original stdenv.
+      extraBuildInputs = stdenv.lib.optional stdenv.isDarwin darwin.CF;
+    });
+
+    libcxxStdenv = stdenv.override (drv: {
+      allowedRequisites = null;
+      cc = self.libcxxClang;
+      # Don't include the libc++ and libc++abi from the original stdenv.
+      extraBuildInputs = stdenv.lib.optional stdenv.isDarwin darwin.CF;
+    });
 
     lldb = callPackage ./lldb.nix {};