anchor.diff:  
     buildInputs = [
       ffmpeg
  +    lib-bash
     ];
   
     meta = with stdenv.lib; {
  
positive.code: , fetchgit
  
  , ffmpeg
  }:
  
  stdenv.mkDerivation rec {
  
negative.code: 
    src = fetchgit {
      url = "https://github.com/chlorm/arkive.git";
      rev = "538d6413673e6fee40ed0c936a534ca18b24ccf9";
      sha256 = "19hjbn57y2a5gf9hwqr51cy380m5z9qmjmf5rjags3cqc36nqgag";
    };
  
    nativeBuildInputs = [
  