anchor.diff:    buildInputs = [
       curl
       googletest
  -    openssl
  +    openssl_1-0-2
       xorg.fixesproto
       xorg.inputproto
       xorg.kbproto
  
positive.code: 
  , curl
  , googletest
  , openssl
  , xorg
  }:
  
  let
    version = "1.8.5";
  in
  stdenv.mkDerivation {
    name = "synergy-${version}";
  
negative.code:     owner = "symless";
      repo = "synergy";
      rev = "v${version}-stable";
      sha256 = "8301b2851089ad74c882c0d25586e010e64378d9061f8acc9c4ed8440c5bf84e";
    };
  
    nativeBuildInputs = [
  