diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index 4f89abd88584..b9f74c60d7d7 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -17364,6 +17364,7 @@ in
     inherit (darwin.apple_sdk.frameworks)
       AppKit Carbon Cocoa IOKit OSAKit Quartz QuartzCore WebKit
       ImageCaptureCore GSS ImageIO;
+    stdenv = if stdenv.cc.isClang then llvmPackages_6.stdenv else stdenv;
   };
 
   emacsPackagesFor = emacs: self: let callPackage = newScope self; in rec {