anchor.diff:  
       src = fetchurl {
         url = "${baseUrl}/${version}-${buildNumber}/Ubuntu/Installer/x86_64/synology-drive-client-${buildNumber}.x86_64.deb";
  -      sha256 = "19fd2r39lb7bb6vkxfxyq0gp3l7pk5wy9fl0r7qwhym2jpi8yv6l";
  +      sha256 = "sha256-UAO/LwqPchIMhjdQP4METjVorMJsbvIDRkp4JxtZgOs=";
       };
   
       nativeBuildInputs = [ autoPatchelfHook dpkg ];
  
positive.code: { stdenv, lib, qt5, fetchurl, autoPatchelfHook, dpkg, glibc, cpio, xar, undmg, gtk3, pango }:
  let
    pname = "synology-drive-client";
    buildNumber = "12682";
    version = "3.0.2";
    baseUrl = "https://global.download.synology.com/download/Utility/SynologyDriveClient";
    meta = with lib; {
      description = "Desktop application to synchronize files and folders between the computer and the Synology Drive server.";
      homepage = "https://www.synology.com/en-global/dsm/feature/drive";
  
negative.code: 
      src = fetchurl {
        url = "${baseUrl}/${version}-${buildNumber}/Mac/Installer/synology-drive-client-${buildNumber}.dmg";
        sha256 = "15wici8ycil1mfh5cf89rfan4kb93wfkdsd4kmpvzjj4bnddwlxa";
      };
  
      nativeBuildInputs = [ cpio xar undmg ];
  