anchor.diff:              os = "linux";
             });
             impure = runCommand "${baseName}-config.json"
  -            { buildInputs = [ jq ]; }
  +            { nativeBuildInputs = [ jq ]; }
               ''
                  jq ".created = \"$(TZ=utc date --iso-8601="seconds")\"" ${pure} > $out
               '';
  
positive.code:     uid ? 0, gid ? 0,
    }:
      runCommand "${name}-customisation-layer" {
        buildInputs = [ jshon rsync tarsum ];
        inherit extraCommands;
      }
      ''
  
negative.code:           inherit uid gid extraCommands;
          };
        result = runCommand "docker-image-${baseName}.tar.gz" {
          nativeBuildInputs = [ jshon pigz coreutils findutils jq ];
          # Image name and tag must be lowercase
          imageName = lib.toLower name;
          baseJson = configJson;
  