anchor.diff:  
     src = fetchurl {
       url = "https://api.snapcraft.io/api/v1/snaps/download/H8ZpNgIoPyvmkgxOWw5MSzsXK1wRZiHn_${rev}.snap";
  -    sha256 = "10az47cc3lgsdi0ixmmna08nqf9xm7gsl1ph00wfwrxzsi05ygx3";
  +    sha256 = "sha256-RxjxOYrbneVctyTJTMvoN/UdREohaZWb1kTdEeI6mUU=";
     };
   
     nativeBuildInputs = [ autoPatchelfHook makeWrapper squashfsTools ];
  
positive.code: 
  stdenv.mkDerivation rec {
    pname = "authy";
    version = "1.9.0";
    rev = "7";
  
    buildInputs = [
      alsa-lib
  
negative.code: { alsa-lib
  , at-spi2-atk
  , at-spi2-core
  , atk
  , autoPatchelfHook
  , cairo
  , cups
  , dbus
  , electron_9
  , expat
  , fetchurl
  , gdk-pixbuf
  , glib
  , gtk3
  , lib
  , libappindicator-gtk3
  , libdbusmenu-gtk3
  , libuuid
  , makeWrapper
  , nspr
  , nss
  , pango
  , squashfsTools
  , stdenv
  , systemd
  , xorg
  }:
  
  let
  