anchor.diff:    src = fetchurl {
       url = "https://github.com/laurent22/joplin/releases/download/v${version}/Joplin-${version}.${suffix}";
       sha256 = {
  -      x86_64-linux = "1dldy137ia8qxhf7d5xzq5slm12bhnmw4kx7fm37n1ajjdcn5sf7";
  -      x86_64-darwin = "0zm9vhxlfs1ldd8za4yha54psqwl0al4hzdfxjfp7ir98i9a4cj7";
  +      x86_64-linux = "12wh7f1a9sn250lqnb8c9b5gqr8r76kxrhl0kgsm2lg93jgpvvbb";
  +      x86_64-darwin = "1jzfqwyz3vkmmkdzx3iw36fbjq7fns46v8crmg5n09w9kvf22qil";
       }.${system} or throwSystem;
     };
   
  
positive.code:     extraPkgs = appimageTools.defaultFhsEnvArgs.multiPkgs;
      extraInstallCommands = ''
        mv $out/bin/{${name},${pname}}
        install -Dm444 ${appimageContents}/joplin.desktop -t $out/share/applications
        install -Dm444 ${appimageContents}/joplin.png -t $out/share/pixmaps
        substituteInPlace $out/share/applications/joplin.desktop \
          --replace 'Exec=AppRun' 'Exec=${pname}'
      '';
    };
  
negative.code: 
  let
    pname = "joplin-desktop";
    version = "1.4.15";
    name = "${pname}-${version}";
  
    inherit (stdenv.hostPlatform) system;
  