anchor.diff:      , imageDigest
       , sha256
       , os ? "linux"
  -    , arch ? getArch system
  +    , arch ? defaultArch
   
         # This is used to set name to the pulled image
       , finalImageName ? imageName
  
positive.code:       streamScript = writePython3 "stream" {} ./stream_layered_image.py;
        baseJson = writeText "${name}-base.json" (builtins.toJSON {
           inherit config;
           architecture = getArch system;
           os = "linux";
        });
  
  
negative.code:       baseJson = let
            pure = writeText "${baseName}-config.json" (builtins.toJSON {
              inherit created config;
              architecture = defaultArch;
              os = "linux";
            });
            impure = runCommand "${baseName}-config.json"
  