anchor.diff:      repo = pname;
       rev = "v${version}";
       fetchSubmodules = true;
  -    sha256 = "19948jzqpclf8zfzp3k7s580xfjgqcyfwlcp7x7xj8h8lyypzymx";
  +    sha256 = "sha256-vfp/vacIItlPP5dR7jzDT7oOUNFnjvvdR46yi79EJKU=";
     };
   
     postPatch = ''
  
positive.code: 
    buildInputs = [
      SDL2
      ffmpeg_3
      glew
      libzip
      qtbase
  
negative.code: { mkDerivation
  , fetchFromGitHub
  , SDL2
  , cmake
  , ffmpeg
  , glew
  , lib
  , libzip
  , pkg-config
  , python3
  , qtbase
  