diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index b047fc31839..b162ebf9e3a 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -190,7 +190,7 @@ rec {
   };
 
   # commented out because it's using the new configuration style proposal which is unstable
-  
+  /*  
   mkDerivationByConfiguration = ({ flagConfig ? {}, optionals ? [], defaults ? [],  
         extraAttrs, collectExtraPhaseActions ? []} :
     args: with args.lib_unstable; with args;
@@ -201,6 +201,7 @@ rec {
       {
         inherit (co) configureFlags buildInputs /*flags*/;
       } // extraAttrs co  // co.pass // co.flags_prefixed ));
+  */
   
 
   # Check absence of non-used options