anchor.diff:    throwSystem = throw "Unsupported system: ${system}";
   
     sha256 = {
  -    x86_64-darwin = "05xsbiviikrwfayjr6rvvfkm70681x2an6mgcg1cxw1fsi4sr6fd";
  -    x86_64-linux = "0h2rfgx92yq9a6dqsv9a0r8a6m5xfrywkljjk5w9snw49b0r1p12";
  +    x86_64-darwin = "0z731q00bwljlcmbjwqphyys7skqms1vg87pyi4nsvjmc7kjx7qg";
  +    x86_64-linux = "0wrs0i2bqv21ivy8s88khbww28b3gsw4abbbbjc76mqma9b0bajs";
  +  }.${system} or throwSystem;
  +
  +  version = {
  +    x86_64-darwin = "4.4.2";
  +    x86_64-linux = "4.4.2";
     }.${system} or throwSystem;
   
     meta = with stdenv.lib; {
  
positive.code:   };
  
    linux = stdenv.mkDerivation rec {
      inherit pname meta;
      version = "4.4.0";
      src = fetchurl {
        url = "https://downloads.slack-edge.com/linux_releases/slack-desktop-${version}-amd64.deb";
        inherit sha256;
  
negative.code:   };
  
    darwin = stdenv.mkDerivation rec {
      inherit pname meta version;
  
      phases = [ "installPhase" ];
  
  