anchor.diff:      owner = "cisco";
       repo = "openh264";
       rev = "v${version}";
  -    sha256 = "8a3e0bf2c5b8a2b3684ddb24b4d3422b31e1cb34ec3ffb193c2ade67b9900f08";
  +    sha256 = "16f07de5e382c67d6f672b4a4a1837fdc97d4517dd3905693d8d4d9b166753c1";
     };
   
     nativeBuildInputs = [
  
positive.code:     optionalString
      platforms;
  
    version = "1.7.0";
  in
  stdenv.mkDerivation rec {
    name = "openh264-${version}";
  
negative.code: { stdenv
  , fetchFromGitHub
  , lib
  
  , nasm
  