dmd: Add darwin/Foundation dependency to fix build on Darwin

pkgs/development/compilers/dmd/default.nix

@@ -1,6 +1,6 @@
 { stdenv, fetchFromGitHub
 , makeWrapper, unzip, which
-, curl, tzdata, gdb
+, curl, tzdata, gdb, darwin
 # Versions 2.070.2 and up require a working dmd compiler to build:
 , bootstrapDmd }:
 
@@ -73,7 +73,12 @@ stdenv.mkDerivation rec {
             --replace MACOSX_DEPLOYMENT_TARGET MACOSX_DEPLOYMENT_TARGET_
     '';
 
-  nativeBuildInputs = [ bootstrapDmd makeWrapper unzip which gdb ];
+  nativeBuildInputs = [ bootstrapDmd makeWrapper unzip which gdb ]
+
+  ++ stdenv.lib.optional stdenv.hostPlatform.isDarwin (with darwin.apple_sdk.frameworks; [
+    Foundation
+  ]);
+
   buildInputs = [ curl tzdata ];
 
   # Buid and install are based on http://wiki.dlang.org/Building_DMD