anchor.diff:          extraConfig   = musnixRealtimeKernelExtraConfig;
         };
   
  -      linux_opt       = linux.override {
  -        extraConfig   = musnixStandardKernelExtraConfig;
  +      linux_opt = linux.override {
  +        extraConfig = musnixStandardKernelExtraConfig;
         };
   
         linuxPackages_3_14_rt = recurseIntoAttrs (linuxPackagesFor linux_3_14_rt linuxPackages_3_14_rt);
  
positive.code:         extraConfig   = musnixRealtimeKernelExtraConfig;
        };
  
        linux_4_1_rt    = makeOverridable (import ../pkgs/os-specific/linux/kernel/linux-4.1-rt.nix) {
          inherit fetchurl stdenv perl buildLinux;
          kernelPatches = [ kernelPatches.bridge_stp_helper
                            realtimePatches.realtimePatch_4_1
  
negative.code: 
      nixpkgs.config.packageOverrides = pkgs: with pkgs; rec {
  
        linux_3_14_rt = makeOverridable (import ../pkgs/os-specific/linux/kernel/linux-3.14-rt.nix) {
          inherit fetchurl stdenv perl buildLinux;
          kernelPatches = [ kernelPatches.bridge_stp_helper
                            realtimePatches.realtimePatch_3_14
  