diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index 91bd3639de9a..22d842be9220 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -27084,7 +27084,7 @@ with pkgs;
 
     # C++20 is required, darwin has Clang 7 by default, aarch64 has gcc 9 by default
     stdenv = if stdenv.isDarwin
-      then clang12Stdenv
+      then llvmPackages_12.stdenv
       else if stdenv.isAarch64 then gcc10Stdenv else stdenv;
 
     # tdesktop has random crashes when jemalloc is built with gcc.