anchor.diff:    nix = nixStable;
   
     nixStable = callPackage common (rec {
  -    name = "nix-2.3.10";
  +    pname = "nix";
  +    version = "2.3.10";
       src = fetchurl {
  -      url = "https://nixos.org/releases/nix/${name}/${name}.tar.xz";
  +      url = "https://nixos.org/releases/nix/${pname}-${version}/${pname}-${version}.tar.xz";
         sha256 = "a8a85e55de43d017abbf13036edfb58674ca136691582f17080c1cd12787b7ab";
       };
   
  
positive.code:   });
  
    nixUnstable = lib.lowPrio (callPackage common rec {
      name = "nix-2.4${suffix}";
      suffix = "pre20210326_dd77f71";
  
      src = fetchFromGitHub {
  
negative.code:   , withLibseccomp ? lib.any (lib.meta.platformMatch stdenv.hostPlatform) libseccomp.meta.platforms, libseccomp
    , withAWS ? !enableStatic && (stdenv.isLinux || stdenv.isDarwin), aws-sdk-cpp
    , enableStatic ? stdenv.hostPlatform.isStatic
    , pname, version, suffix ? "", src
    , patches ? [ ]
    }:
    let
       sh = busybox-sandbox-shell;
       nix = stdenv.mkDerivation rec {
        inherit pname version src patches;
  
        is24 = lib.versionAtLeast version "2.4pre";
  
  